<PAGE> PAGE 1
000 B000000 11/30/98
000 C000000 0000707823
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 A
001 A000000 FIDELITY MT. VERNON STREET TRUST
001 B000000 811-3583
001 C000000 6175631413
002 A000000 82 DEVONSHIRE STREET
002 B000000 BOSTON
002 C000000 MA
002 D010000 02109
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 3
007 C010100 1
007 C020100 FIDELITY GROWTH COMPANY FUND
007 C030100 N
007 C010200 2
007 C020200 FIDELITY AGGRESSIVE GROWTH FUND
007 C030200 N
007 C010300 3
007 C020300 FIDELITY NEW MILLENNIUM FUND
007 C030300 N
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
008 A00AA01 FIDELITY MANAGEMENT & RESEARCH COMPANY
008 B00AA01 A
008 C00AA01 801-7884
008 D01AA01 BOSTON
008 D02AA01 MA
008 D03AA01 02109
008 A00AA02 FIDELITY MANAGEMENT & RESEARCH (U.K.) INC.
008 B00AA02 S
008 C00AA02 801-28773
008 D01AA02 LONDON
008 D05AA02 ENGLAND
008 A00AA03 FIDELITY MANAGEMENT & RESEARCH (FAR EAST)INC.
008 B00AA03 S
<PAGE> PAGE 2
008 C00AA03 801-28774
008 D01AA03 TOKYO
008 D05AA03 JAPAN
011 A00AA01 FIDELITY DISTRIBUTORS CORPORATION
011 B00AA01 8-8775
011 C01AA01 BOSTON
011 C02AA01 MA
011 C03AA01 02109
011 A00AA02 DELETE
011 A00AA03 DELETE
012 A00AA01 FIDELITY SERVICE COMPANY, INC.
012 B00AA01 84-00216
012 C01AA01 BOSTON
012 C02AA01 MA
012 C03AA01 02109
012 A00AA02 DELETE
012 A00AA03 DELETE
013 A00AA01 PRICEWATERHOUSECOOPERS LLP
013 B01AA01 BOSTON
013 B02AA01 MA
013 B03AA01 02109
014 A00AA01 FIDELITY BROKERAGE SERVICES, INC.
014 B00AA01 8-23292
014 A00AA02 FIDELITY DISTRIBUTORS CORP.
014 B00AA02 8-8775
014 A00AA03 FIDELITY BROKERAGE SERVICES
014 B00AA03 8-0000
014 A00AA04 NATIONAL FINANCIAL SERVICE COMPANY
014 B00AA04 8-26740
018 00AA00 Y
019 A00AA00 Y
019 B00AA00 227
019 C00AA00 FIDELITYZZ
020 A000001 FIDELITY BROKERAGE SERVICES, INC.
020 B000001 04-2653569
020 C000001 3504
020 A000002 CREDIT SUISSE FIRST BOSTON CORP.
020 B000002 13-5659485
020 C000002 1150
020 A000003 NATIONSBANC MONTGOMERY SECURITIES
020 B000003 00-0000000
020 C000003 1016
020 A000004 DONALDSON, LUFKIN & JENRETTE SECURITIES CORP.
020 B000004 13-2741729
020 C000004 799
020 A000005 GOLDMAN SACHS & CO.
020 B000005 13-5108880
020 C000005 766
020 A000006 SCHRODER & CO., INC.
020 B000006 13-2697272
020 C000006 736
<PAGE> PAGE 3
020 A000007 MORGAN STANLEY & CO., INC.
020 B000007 13-2655998
020 C000007 702
020 A000008 SALOMON SMITH BARNEY, INC.
020 B000008 00-0000000
020 C000008 699
020 A000009 BT ALEX. BROWN, INC.
020 B000009 13-3311934
020 C000009 688
020 A000010 DEUTSCHE BANK SECURITIES, INC.
020 B000010 13-2730828
020 C000010 657
021 000000 18816
022 A000001 TAXABLE CENTRAL CASH FUND
022 B000001 04-3331103
022 C000001 4061600
022 D000001 4236693
022 A000002 SALOMON SMITH BARNEY, INC.
022 B000002 00-0000000
022 C000002 877735
022 D000002 529799
022 A000003 MERRIL LYNCH, PIERCE, FENNER & SMITH, INC.
022 B000003 13-5674085
022 C000003 511333
022 D000003 571828
022 A000004 DONALDSON, LUFKIN & JENRETTE SECURITIES CORP.
022 B000004 13-2741729
022 C000004 341347
022 D000004 423756
022 A000005 GOLDMAN, SACHS & CO.
022 B000005 13-5108880
022 C000005 324294
022 D000005 393082
022 A000006 CONTRAFUND INC.
022 B000006 04-6056833
022 C000006 307408
022 D000006 382081
022 A000007 BT ALEX. BROWN INC.
022 B000007 13-3311934
022 C000007 343914
022 D000007 320921
022 A000008 MORGAN STANLEY & CO., INC.
022 B000008 13-2655998
022 C000008 350529
022 D000008 303724
022 A000009 INSTINET CORP.
022 B000009 13-3443395
022 C000009 289750
022 D000009 252099
022 A000010 CREDIT SUISSE FIRST BOSTON CORP.
022 B000010 13-5659485
<PAGE> PAGE 4
022 C000010 181038
022 D000010 152396
023 C000000 10370973
023 D000000 10435634
026 A000000 Y
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 Y
026 G010000 N
026 G020000 N
026 H000000 Y
027 000000 Y
034 00AA00 N
035 00AA00 0
036 B00AA00 0
042 A00AA00 0
042 B00AA00 0
042 C00AA00 0
042 D00AA00 0
042 E00AA00 0
042 F00AA00 0
042 G00AA00 0
042 H00AA00 0
043 00AA00 0
044 00AA00 0
045 00AA00 Y
046 00AA00 N
047 00AA00 N
048 00AA00 0.000
048 A01AA00 0
048 A02AA00 0.000
048 B01AA00 0
048 B02AA00 0.000
048 C01AA00 0
048 C02AA00 0.000
048 D01AA00 0
048 D02AA00 0.000
048 E01AA00 0
048 E02AA00 0.000
048 F01AA00 0
048 F02AA00 0.000
048 G01AA00 0
048 G02AA00 0.000
048 H01AA00 0
048 H02AA00 0.000
048 I01AA00 0
048 I02AA00 0.000
048 J01AA00 0
048 J02AA00 0.000
<PAGE> PAGE 5
048 K01AA00 0
048 K02AA00 0.000
054 A00AA00 Y
054 B00AA00 Y
054 C00AA00 N
054 D00AA00 N
054 E00AA00 N
054 F00AA00 N
054 G00AA00 Y
054 H00AA00 Y
054 I00AA00 N
054 J00AA00 Y
054 K00AA00 N
054 L00AA00 N
054 M00AA00 Y
054 N00AA00 N
054 O00AA00 Y
058 A00AA00 N
059 00AA00 Y
060 A00AA00 Y
060 B00AA00 Y
061 00AA00 2500
062 A00AA00 N
062 B00AA00 0.0
062 C00AA00 0.0
062 D00AA00 0.0
062 E00AA00 0.0
062 F00AA00 0.0
062 G00AA00 0.0
062 H00AA00 0.0
062 I00AA00 0.0
062 J00AA00 0.0
062 K00AA00 0.0
062 L00AA00 0.0
062 M00AA00 0.0
062 N00AA00 0.0
062 O00AA00 0.0
062 P00AA00 0.0
062 Q00AA00 0.0
062 R00AA00 0.0
077 A000000 Y
077 B000000 Y
077 C000000 N
077 D000000 N
077 E000000 N
077 F000000 N
077 G000000 N
077 H000000 N
077 I000000 N
077 J000000 N
077 K000000 N
<PAGE> PAGE 6
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 N
077 Q020000 N
077 Q030000 N
078 000000 N
080 A00AA00 AMERICAN INTERNATIONAL SPECIALTY LINES INS.CO
080 B00AA00 FEDERAL INSURANCE COMPANY
080 C00AA00 220000
081 A00AA00 Y
081 B00AA00 224
082 A00AA00 N
082 B00AA00 0
083 A00AA00 N
083 B00AA00 0
084 A00AA00 N
084 B00AA00 0
085 A00AA00 Y
085 B00AA00 N
086 A010000 0
086 A020000 0
086 B010000 0
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
015 A000101 BROWN BROTHERS HARRIMAN & CO.
015 B000101 C
015 C010101 BOSTON
015 C020101 MA
015 C030101 02109
015 E010101 X
024 000100 Y
025 A000101 TAXABLE CENTRAL CASH FUND
025 B000101 04-3331103
025 C000101 D
025 D000101 440635
025 A000102 DELETE
025 D000102 0
025 A000103 DELETE
025 D000103 0
025 A000104 DELETE
025 D000104 0
<PAGE> PAGE 7
025 A000105 DELETE
025 D000105 0
025 D000106 0
025 D000107 0
025 D000108 0
028 A010100 189215
028 A020100 461
028 A030100 0
028 A040100 287305
028 B010100 229567
028 B020100 0
028 B030100 0
028 B040100 308977
028 C010100 200350
028 C020100 0
028 C030100 0
028 C040100 335861
028 D010100 243831
028 D020100 0
028 D030100 0
028 D040100 266016
028 E010100 200448
028 E020100 0
028 E030100 0
028 E040100 271466
028 F010100 204520
028 F020100 0
028 F030100 0
028 F040100 229797
028 G010100 1267931
028 G020100 461
028 G030100 0
028 G040100 1699422
028 H000100 0
029 000100 N
030 A000100 0
030 B000100 0.00
030 C000100 0.00
031 A000100 0
031 B000100 0
032 000100 0
033 000100 0
037 000100 N
038 000100 0
039 000100 N
040 000100 N
049 000100 N
050 000100 N
051 000100 Y
052 000100 Y
053 A000100 Y
<PAGE> PAGE 8
053 B000100 Y
053 C000100 N
055 A000100 N
055 B000100 N
056 000100 Y
057 000100 N
066 A000100 Y
066 B000100 N
066 C000100 Y
066 D000100 N
066 E000100 N
066 F000100 N
066 G000100 N
067 000100 N
068 A000100 N
068 B000100 N
069 000100 N
070 A010100 Y
070 A020100 Y
070 B010100 Y
070 B020100 N
070 C010100 Y
070 C020100 N
070 D010100 Y
070 D020100 N
070 E010100 Y
070 E020100 N
070 F010100 Y
070 F020100 N
070 G010100 Y
070 G020100 N
070 H010100 Y
070 H020100 N
070 I010100 N
070 I020100 N
070 J010100 Y
070 J020100 Y
070 K010100 Y
070 K020100 Y
070 L010100 Y
070 L020100 Y
070 M010100 Y
070 M020100 Y
070 N010100 Y
070 N020100 N
070 O010100 Y
070 O020100 Y
070 P010100 Y
070 P020100 Y
070 Q010100 N
070 Q020100 N
<PAGE> PAGE 9
070 R010100 N
070 R020100 N
071 A000100 7461614
071 B000100 8953115
071 C000100 9831109
071 D000100 76
072 A000100 12
072 B000100 25434
072 C000100 64738
072 D000100 0
072 E000100 0
072 F000100 43633
072 G000100 0
072 H000100 0
072 I000100 22747
072 J000100 283
072 K000100 0
072 L000100 0
072 M000100 45
072 N000100 93
072 O000100 0
072 P000100 1
072 Q000100 827
072 R000100 53
072 S000100 48
072 T000100 0
072 U000100 0
072 V000100 5
072 W000100 32
072 X000100 67767
072 Y000100 2565
072 Z000100 24970
072AA000100 906519
072BB000100 0
072CC010100 745644
072CC020100 0
072DD010100 48716
072DD020100 0
072EE000100 1042040
073 A010100 0.2200
073 A020100 0.0000
073 B000100 4.7100
073 C000100 0.0000
074 A000100 1751
074 B000100 0
074 C000100 0
074 D000100 0
074 E000100 0
074 F000100 10148916
074 G000100 0
074 H000100 0
<PAGE> PAGE 10
074 I000100 440635
074 J000100 38694
074 K000100 0
074 L000100 24796
074 M000100 0
074 N000100 10654792
074 O000100 39493
074 P000100 3530
074 Q000100 0
074 R010100 0
074 R020100 0
074 R030100 0
074 R040100 32562
074 S000100 0
074 T000100 10579207
074 U010100 210657
074 U020100 0
074 V010100 50.22
074 V020100 0.00
074 W000100 0.0000
074 X000100 1121454
074 Y000100 0
075 A000100 0
075 B000100 10377596
076 000100 0.00
015 A000201 BROWN BROTHERS HARRIMAN & CO.
015 B000201 C
015 C010201 BOSTON
015 C020201 MA
015 C030201 02109
015 E010201 X
024 000200 Y
025 A000201 TAXABLE CENTRAL CASH FUND
025 B000201 04-3331103
025 C000201 D
025 D000201 86370
025 A000202 DELETE
025 D000202 0
025 D000203 0
025 D000204 0
025 D000205 0
025 D000206 0
025 D000207 0
025 D000208 0
028 A010200 35196
028 A020200 2
028 A030200 0
028 A040200 28555
028 B010200 72894
028 B020200 0
028 B030200 0
<PAGE> PAGE 11
028 B040200 33887
028 C010200 58203
028 C020200 0
028 C030200 0
028 C040200 48415
028 D010200 41359
028 D020200 0
028 D030200 0
028 D040200 33527
028 E010200 63162
028 E020200 0
028 E030200 0
028 E040200 37938
028 F010200 74887
028 F020200 0
028 F030200 0
028 F040200 35005
028 G010200 345701
028 G020200 2
028 G030200 0
028 G040200 217327
028 H000200 11220
029 000200 Y
030 A000200 620
030 B000200 3.00
030 C000200 0.00
031 A000200 618
031 B000200 0
032 000200 2
033 000200 0
037 000200 Y
038 000200 383
039 000200 N
040 000200 N
049 000200 N
050 000200 N
051 000200 Y
052 000200 Y
053 A000200 Y
053 B000200 Y
053 C000200 N
055 A000200 N
055 B000200 N
056 000200 Y
057 000200 N
066 A000200 Y
066 B000200 Y
066 C000200 N
066 D000200 N
066 E000200 N
066 F000200 N
<PAGE> PAGE 12
066 G000200 N
067 000200 N
068 A000200 N
068 B000200 N
069 000200 N
070 A010200 Y
070 A020200 Y
070 B010200 Y
070 B020200 N
070 C010200 Y
070 C020200 N
070 D010200 Y
070 D020200 N
070 E010200 Y
070 E020200 N
070 F010200 Y
070 F020200 N
070 G010200 Y
070 G020200 N
070 H010200 Y
070 H020200 N
070 I010200 N
070 I020200 N
070 J010200 Y
070 J020200 N
070 K010200 Y
070 K020200 Y
070 L010200 Y
070 L020200 Y
070 M010200 Y
070 M020200 Y
070 N010200 Y
070 N020200 N
070 O010200 Y
070 O020200 Y
070 P010200 Y
070 P020200 Y
070 Q010200 N
070 Q020200 N
070 R010200 N
070 R020200 N
071 A000200 4347565
071 B000200 4233207
071 C000200 2122579
071 D000200 199
072 A000200 12
072 B000200 2796
072 C000200 5373
072 D000200 0
072 E000200 0
072 F000200 17072
<PAGE> PAGE 13
072 G000200 0
072 H000200 0
072 I000200 5402
072 J000200 57
072 K000200 0
072 L000200 0
072 M000200 9
072 N000200 146
072 O000200 0
072 P000200 6
072 Q000200 787
072 R000200 39
072 S000200 16
072 T000200 0
072 U000200 0
072 V000200 2
072 W000200 5
072 X000200 23541
072 Y000200 784
072 Z000200 -14588
072AA000200 282795
072BB000200 0
072CC010200 257933
072CC020200 0
072DD010200 0
072DD020200 0
072EE000200 404243
073 A010200 0.0000
073 A020200 0.0000
073 B000200 6.0800
073 C000200 0.0000
074 A000200 0
074 B000200 0
074 C000200 0
074 D000200 0
074 E000200 0
074 F000200 2444526
074 G000200 0
074 H000200 0
074 I000200 86370
074 J000200 77749
074 K000200 0
074 L000200 7655
074 M000200 0
074 N000200 2616300
074 O000200 93439
074 P000200 1597
074 Q000200 0
074 R010200 0
074 R020200 0
074 R030200 0
<PAGE> PAGE 14
074 R040200 10169
074 S000200 0
074 T000200 2511095
074 U010200 84104
074 U020200 0
074 V010200 29.86
074 V020200 0.00
074 W000200 0.0000
074 X000200 290282
074 Y000200 0
075 A000200 0
075 B000200 2172029
076 000200 0.00
015 A000301 CHASE MANHATTAN BANK, N.A.
015 B000301 C
015 C010301 NEW YORK
015 C020301 NY
015 C030301 10081
015 E010301 X
024 000300 Y
025 A000301 DELETE
025 D000301 0
025 A000302 TAXABLE CENTRAL CASH FUND
025 B000302 04-3331103
025 C000302 D
025 D000302 78005
025 D000303 0
025 D000304 0
025 D000305 0
025 D000306 0
025 D000307 0
025 D000308 0
028 A010300 24028
028 A020300 0
028 A030300 0
028 A040300 40472
028 B010300 44616
028 B020300 0
028 B030300 0
028 B040300 71573
028 C010300 23199
028 C020300 0
028 C030300 0
028 C040300 58746
028 D010300 23680
028 D020300 0
028 D030300 0
028 D040300 39894
028 E010300 57378
028 E020300 0
028 E030300 0
<PAGE> PAGE 15
028 E040300 67786
028 F010300 47886
028 F020300 0
028 F030300 0
028 F040300 46834
028 G010300 220787
028 G020300 0
028 G030300 0
028 G040300 325305
028 H000300 6208
029 000300 Y
030 A000300 638
030 B000300 3.00
030 C000300 0.00
031 A000300 637
031 B000300 0
032 000300 1
033 000300 0
037 000300 N
038 000300 0
039 000300 N
040 000300 N
041 000300 N
049 000300 N
050 000300 N
051 000300 Y
052 000300 Y
053 A000300 Y
053 B000300 Y
053 C000300 N
055 A000300 N
055 B000300 N
056 000300 Y
057 000300 N
066 A000300 Y
066 B000300 N
066 C000300 Y
066 D000300 N
066 E000300 N
066 F000300 N
066 G000300 N
067 000300 N
068 A000300 N
068 B000300 N
069 000300 N
070 A010300 Y
070 A020300 Y
070 B010300 Y
070 B020300 N
070 C010300 Y
070 C020300 N
<PAGE> PAGE 16
070 D010300 Y
070 D020300 N
070 E010300 Y
070 E020300 N
070 F010300 Y
070 F020300 N
070 G010300 Y
070 G020300 N
070 H010300 Y
070 H020300 N
070 I010300 N
070 I020300 N
070 J010300 Y
070 J020300 N
070 K010300 Y
070 K020300 Y
070 L010300 Y
070 L020300 Y
070 M010300 Y
070 M020300 Y
070 N010300 Y
070 N020300 Y
070 O010300 Y
070 O020300 N
070 P010300 Y
070 P020300 Y
070 Q010300 N
070 Q020300 N
070 R010300 N
070 R020300 N
071 A000300 1759816
071 B000300 1955389
071 C000300 1457028
071 D000300 121
072 A000300 12
072 B000300 3128
072 C000300 7624
072 D000300 0
072 E000300 0
072 F000300 9488
072 G000300 0
072 H000300 0
072 I000300 2824
072 J000300 80
072 K000300 0
072 L000300 0
072 M000300 6
072 N000300 55
072 O000300 0
072 P000300 0
072 Q000300 612
<PAGE> PAGE 17
072 R000300 30
072 S000300 6
072 T000300 0
072 U000300 0
072 V000300 0
072 W000300 5
072 X000300 13106
072 Y000300 438
072 Z000300 -1916
072AA000300 152303
072BB000300 0
072CC010300 91061
072CC020300 0
072DD010300 0
072DD020300 0
072EE000300 182103
073 A010300 0.0000
073 A020300 0.0000
073 B000300 2.9200
073 C000300 0.0000
074 A000300 149
074 B000300 0
074 C000300 0
074 D000300 0
074 E000300 0
074 F000300 1458359
074 G000300 0
074 H000300 0
074 I000300 78005
074 J000300 26050
074 K000300 0
074 L000300 2604
074 M000300 0
074 N000300 1565167
074 O000300 16437
074 P000300 583
074 Q000300 0
074 R010300 0
074 R020300 0
074 R030300 0
074 R040300 16965
074 S000300 0
074 T000300 1531182
074 U010300 60602
074 U020300 0
074 V010300 25.27
074 V020300 0.00
074 W000300 0.0000
074 X000300 85818
074 Y000300 0
075 A000300 0
<PAGE> PAGE 18
075 B000300 1525869
076 000300 0.00
SIGNATURE JOHN H. COSTELLO
TITLE ASST. TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000707823
<NAME> Fidelity Mt. Vernon Street Trust
<SERIES>
<NUMBER> 1
<NAME> Fidelity Growth Company Fund
<MULTIPLIER> 1,000
<S>
<C>
<PERIOD-TYPE>
YEAR
<FISCAL-YEAR-END>
NOV-30-1998
<PERIOD-END>
NOV-30-1998
<INVESTMENTS-AT-COST>
7,481,015
<INVESTMENTS-AT-VALUE>
10,589,551
<RECEIVABLES>
65,241
<ASSETS-OTHER>
0
<OTHER-ITEMS-ASSETS>
0
<TOTAL-ASSETS>
10,654,792
<PAYABLE-FOR-SECURITIES>
39,493
<SENIOR-LONG-TERM-DEBT>
0
<OTHER-ITEMS-LIABILITIES>
36,092
<TOTAL-LIABILITIES>
75,585
<SENIOR-EQUITY>
0
<PAID-IN-CAPITAL-COMMON>
6,569,076
<SHARES-COMMON-STOCK>
210,657
<SHARES-COMMON-PRIOR>
219,966
<ACCUMULATED-NII-CURRENT>
21,710
<OVERDISTRIBUTION-NII>
0
<ACCUMULATED-NET-GAINS>
879,883
<OVERDISTRIBUTION-GAINS>
0
<ACCUM-APPREC-OR-DEPREC>
3,108,538
<NET-ASSETS>
10,579,207
<DIVIDEND-INCOME>
64,738
<INTEREST-INCOME>
25,434
<OTHER-INCOME>
0
<EXPENSES-NET>
65,202
<NET-INVESTMENT-INCOME>
24,970
<REALIZED-GAINS-CURRENT>
906,519
<APPREC-INCREASE-CURRENT>
745,644
<NET-CHANGE-FROM-OPS>
1,677,133
<EQUALIZATION>
0
<DISTRIBUTIONS-OF-INCOME>
48,716
<DISTRIBUTIONS-OF-GAINS>
1,042,040
<DISTRIBUTIONS-OTHER>
0
<NUMBER-OF-SHARES-SOLD>
60,568
<NUMBER-OF-SHARES-REDEEMED>
95,901
<SHARES-REINVESTED>
26,024
<NET-CHANGE-IN-ASSETS>
54,983
<ACCUMULATED-NII-PRIOR>
54,423
<ACCUMULATED-GAINS-PRIOR>
1,210,383
<OVERDISTRIB-NII-PRIOR>
0
<OVERDIST-NET-GAINS-PRIOR>
0
<GROSS-ADVISORY-FEES>
43,633
<INTEREST-EXPENSE>
1
<GROSS-EXPENSE>
67,767
<AVERAGE-NET-ASSETS>
10,377,596
<PER-SHARE-NAV-BEGIN>
47.840
<PER-SHARE-NII>
.110
<PER-SHARE-GAIN-APPREC>
7.200
<PER-SHARE-DIVIDEND>
.220
<PER-SHARE-DISTRIBUTIONS>
4.710
<RETURNS-OF-CAPITAL>
0
<PER-SHARE-NAV-END>
50.220
<EXPENSE-RATIO>
65
<AVG-DEBT-OUTSTANDING>
0
<AVG-DEBT-PER-SHARE>
0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000707823
<NAME> Fidelity Mt. Vernon Street Trust
<SERIES>
<NUMBER> 3
<NAME> Fidelity New Millenium Fund
<MULTIPLIER> 1,000
<S>
<C>
<PERIOD-TYPE>
YEAR
<FISCAL-YEAR-END>
NOV-30-1998
<PERIOD-END>
NOV-30-1998
<INVESTMENTS-AT-COST>
1,167,563
<INVESTMENTS-AT-VALUE>
1,536,364
<RECEIVABLES>
28,654
<ASSETS-OTHER>
149
<OTHER-ITEMS-ASSETS>
0
<TOTAL-ASSETS>
1,565,167
<PAYABLE-FOR-SECURITIES>
16,437
<SENIOR-LONG-TERM-DEBT>
0
<OTHER-ITEMS-LIABILITIES>
17,548
<TOTAL-LIABILITIES>
33,985
<SENIOR-EQUITY>
0
<PAID-IN-CAPITAL-COMMON>
1,014,729
<SHARES-COMMON-STOCK>
60,602
<SHARES-COMMON-PRIOR>
62,496
<ACCUMULATED-NII-CURRENT>
0
<OVERDISTRIBUTION-NII>
0
<ACCUMULATED-NET-GAINS>
147,652
<OVERDISTRIBUTION-GAINS>
0
<ACCUM-APPREC-OR-DEPREC>
368,801
<NET-ASSETS>
1,531,182
<DIVIDEND-INCOME>
7,624
<INTEREST-INCOME>
3,128
<OTHER-INCOME>
0
<EXPENSES-NET>
12,668
<NET-INVESTMENT-INCOME>
(1,916)
<REALIZED-GAINS-CURRENT>
152,303
<APPREC-INCREASE-CURRENT>
91,061
<NET-CHANGE-FROM-OPS>
241,448
<EQUALIZATION>
0
<DISTRIBUTIONS-OF-INCOME>
0
<DISTRIBUTIONS-OF-GAINS>
182,103
<DISTRIBUTIONS-OTHER>
0
<NUMBER-OF-SHARES-SOLD>
19,108
<NUMBER-OF-SHARES-REDEEMED>
29,373
<SHARES-REINVESTED>
8,371
<NET-CHANGE-IN-ASSETS>
1,496
<ACCUMULATED-NII-PRIOR>
0
<ACCUMULATED-GAINS-PRIOR>
219,448
<OVERDISTRIB-NII-PRIOR>
0
<OVERDIST-NET-GAINS-PRIOR>
0
<GROSS-ADVISORY-FEES>
9,488
<INTEREST-EXPENSE>
0
<GROSS-EXPENSE>
13,106
<AVERAGE-NET-ASSETS>
1,525,869
<PER-SHARE-NAV-BEGIN>
24.480
<PER-SHARE-NII>
(.030)
<PER-SHARE-GAIN-APPREC>
3.740
<PER-SHARE-DIVIDEND>
0
<PER-SHARE-DISTRIBUTIONS>
2.920
<RETURNS-OF-CAPITAL>
0
<PER-SHARE-NAV-END>
25.270
<EXPENSE-RATIO>
86
<AVG-DEBT-OUTSTANDING>
0
<AVG-DEBT-PER-SHARE>
0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000707823
<NAME> Fidelity Mt. Vernon Street Trust
<SERIES>
<NUMBER> 2
<NAME> Fidelity Emerging Growth Fund
<MULTIPLIER> 1,000
<S>
<C>
<PERIOD-TYPE>
YEAR
<FISCAL-YEAR-END>
NOV-30-1998
<PERIOD-END>
NOV-30-1998
<INVESTMENTS-AT-COST>
2,013,220
<INVESTMENTS-AT-VALUE>
2,530,896
<RECEIVABLES>
85,404
<ASSETS-OTHER>
0
<OTHER-ITEMS-ASSETS>
0
<TOTAL-ASSETS>
2,616,300
<PAYABLE-FOR-SECURITIES>
93,439
<SENIOR-LONG-TERM-DEBT>
0
<OTHER-ITEMS-LIABILITIES>
11,766
<TOTAL-LIABILITIES>
105,205
<SENIOR-EQUITY>
0
<PAID-IN-CAPITAL-COMMON>
1,740,448
<SHARES-COMMON-STOCK>
84,104
<SHARES-COMMON-PRIOR>
66,638
<ACCUMULATED-NII-CURRENT>
0
<OVERDISTRIBUTION-NII>
0
<ACCUMULATED-NET-GAINS>
252,970
<OVERDISTRIBUTION-GAINS>
0
<ACCUM-APPREC-OR-DEPREC>
517,677
<NET-ASSETS>
2,511,095
<DIVIDEND-INCOME>
5,373
<INTEREST-INCOME>
2,796
<OTHER-INCOME>
0
<EXPENSES-NET>
22,757
<NET-INVESTMENT-INCOME>
(14,588)
<REALIZED-GAINS-CURRENT>
282,795
<APPREC-INCREASE-CURRENT>
257,933
<NET-CHANGE-FROM-OPS>
526,140
<EQUALIZATION>
0
<DISTRIBUTIONS-OF-INCOME>
0
<DISTRIBUTIONS-OF-GAINS>
404,243
<DISTRIBUTIONS-OTHER>
0
<NUMBER-OF-SHARES-SOLD>
18,826
<NUMBER-OF-SHARES-REDEEMED>
19,064
<SHARES-REINVESTED>
17,704
<NET-CHANGE-IN-ASSETS>
533,388
<ACCUMULATED-NII-PRIOR>
0
<ACCUMULATED-GAINS-PRIOR>
444,864
<OVERDISTRIB-NII-PRIOR>
0
<OVERDIST-NET-GAINS-PRIOR>
0
<GROSS-ADVISORY-FEES>
17,072
<INTEREST-EXPENSE>
6
<GROSS-EXPENSE>
23,541
<AVERAGE-NET-ASSETS>
2,172,029
<PER-SHARE-NAV-BEGIN>
29.680
<PER-SHARE-NII>
(.180)
<PER-SHARE-GAIN-APPREC>
6.440
<PER-SHARE-DIVIDEND>
0
<PER-SHARE-DISTRIBUTIONS>
6.080
<RETURNS-OF-CAPITAL>
0
<PER-SHARE-NAV-END>
29.860
<EXPENSE-RATIO>
108
<AVG-DEBT-OUTSTANDING>
0
<AVG-DEBT-PER-SHARE>
0
</TABLE>
