<PAGE> PAGE 1
000 A000000 08/31/97
000 C000000 0000908406
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0
000 J000000 A
001 A000000 AMERICAN CENTURY INVESTMENT TRUST
001 B000000 811-7822
001 C000000 8165315575
002 A000000 4500 MAIN
002 B000000 KANSAS CITY
002 C000000 MO
002 D010000 64111
002 D020000 7709
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 1
007 C010100 1
007 C020100 AMERICAN CENTURY-BENHAM PRIME MONEY MARKET FD
007 C030100 N
007 C010200 2
007 C010300 3
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
008 A00AA01 BENHAM MANAGEMENT CORPORATION
008 B00AA01 A
008 C00AA01 801-8298
008 D01AA01 MOUNTAIN VIEW
008 D02AA01 CA
008 D03AA01 94043
008 D04AA01 1211
008 A00AA02 AMERICAN CENTURY INVESTMENT MANAGEMENT, INC.
008 B00AA02 A
008 C00AA02 801-08174
008 D01AA02 KANSAS CITY
008 D02AA02 MO
008 D03AA02 64111
008 D04AA02 7709
010 A00AA01 AMERICAN CENTURY SERVICES CORPORATION
010 B00AA01 84-1406
<PAGE> PAGE 2
010 C01AA01 KANSAS CITY
010 C02AA01 MO
010 C03AA01 64111
010 C04AA01 7709
011 A00AA01 AMERICAN CENTURY INVESTMENT SERVICES, INC.
011 B00AA01 8-35220
011 C01AA01 KANSAS CITY
011 C02AA01 MO
011 C03AA01 64111
011 C04AA01 7709
012 A00AA01 AMERICAN CENTURY SERVICES CORPORATION
012 B00AA01 84-1406
012 C01AA01 KANSAS CITY
012 C02AA01 MO
012 C03AA01 64111
012 C04AA01 7709
013 A00AA01 KPMG PEAT MARWICK LLP
013 B01AA01 KANSAS CITY
013 B02AA01 MO
013 B03AA01 64106
013 A00AA02 DELETE
014 A00AA01 AMERICAN CENTURY INVESTMENT SERVICES, INC.
014 B00AA01 8-35220
015 A00AA01 CHASE MANHATTAN BANK, N.A.
015 B00AA01 C
015 C01AA01 NEW YORK
015 C02AA01 NY
015 C03AA01 10003
015 E01AA01 X
018 00AA00 Y
019 A00AA00 Y
019 B00AA00 71
019 C00AA00 AMERICENIN
020 C000001 0
020 C000002 0
020 C000003 0
020 C000004 0
020 C000005 0
020 C000006 0
020 C000007 0
020 C000008 0
020 C000009 0
020 C000010 0
021 000000 0
022 A000001 ALLDMAN SACHS
022 B000001 13-5108880
022 C000001 668722
022 D000001 16324
022 A000002 LEHMAN BROTHERS
022 B000002 13-2518466
022 C000002 522067
<PAGE> PAGE 3
022 D000002 0
022 A000003 J.P. MORGAN
022 B000003 13-3224022
022 C000003 487434
022 D000003 30793
022 A000004 B. T. SECURITIES
022 B000004 13-3311934
022 C000004 355669
022 D000004 0
022 A000005 MERRILL LYNCH
022 B000005 13-5674085
022 C000005 355550
022 D000005 0
022 A000006 G.E. CAPITAL
022 C000006 301057
022 D000006 0
022 A000007 CHASE MANHATTAN BANK
022 C000007 153358
022 D000007 0
022 A000008 CHEVRON
022 C000008 128425
022 D000008 4999
022 A000009 MORGAN STANLEY
022 B000009 13-2655998
022 C000009 132334
022 D000009 0
022 A000010 WESTDEUTSCHE
022 C000010 122611
022 D000010 0
023 C000000 4098821
023 D000000 52117
025 A00AA01 MORGAN STANLEY GROUP
025 B00AA01 13-2655998
025 C00AA01 D
025 D00AA01 32343
025 A00AA02 MERRILL LYNCH & COMPANY
025 B00AA02 13-5674085
025 C00AA02 D
025 D00AA02 55092
025 A00AA03 B.T. SECURITIES
025 B00AA03 13-3311934
025 C00AA03 D
025 D00AA03 19975
025 A00AA04 GOLDMAN SACHS GROUP
025 B00AA04 13-5108880
025 C00AA04 D
025 D00AA04 34776
025 A00AA05 CREDIT SUISSE FIRST BOSTON, INC.
025 C00AA05 D
025 D00AA05 39428
025 A00AA06 GENERAL ELECTRIC CAPITAL CORPORATION
<PAGE> PAGE 4
025 C00AA06 D
025 D00AA06 32584
025 A00AA07 SOCIETE GENERALE
025 C00AA07 D
025 D00AA07 39993
025 A00AA08 TRAVELERS INSURANCE COMPANY
025 C00AA08 D
025 D00AA08 35200
025 A00AA09 CHASE MANHATTAN CORPORATION
025 C00AA09 D
025 D00AA09 19773
025 A00AA10 DELETE
025 D00AA10 0
025 D00AA11 0
025 D00AA12 0
025 D00AA13 0
025 D00AA14 0
025 D00AA15 0
025 D00AA16 0
026 A000000 N
026 B000000 N
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 Y
028 A01AA00 142405
028 A02AA00 4921
028 A03AA00 0
028 A04AA00 129819
028 B01AA00 197107
028 B02AA00 4839
028 B03AA00 0
028 B04AA00 225751
028 C01AA00 136917
028 C02AA00 4816
028 C03AA00 0
028 C04AA00 140713
028 D01AA00 130899
028 D02AA00 5106
028 D03AA00 0
028 D04AA00 133719
028 E01AA00 237843
028 E02AA00 5376
028 E03AA00 0
028 E04AA00 140984
028 F01AA00 173555
028 F02AA00 5180
<PAGE> PAGE 5
028 F03AA00 0
028 F04AA00 158048
028 G01AA00 1018726
028 G02AA00 30238
028 G03AA00 0
028 G04AA00 929034
028 H00AA00 0
029 00AA00 N
030 A00AA00 0
030 B00AA00 0.00
030 C00AA00 0.00
031 A00AA00 0
031 B00AA00 0
032 00AA00 0
033 00AA00 0
034 00AA00 N
035 00AA00 0
036 B00AA00 0
037 00AA00 N
038 00AA00 0
039 00AA00 Y
040 00AA00 N
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
<PAGE> PAGE 6
048 H02AA00 0.000
048 I01AA00 0
048 I02AA00 0.000
048 J01AA00 0
048 J02AA00 0.000
048 K01AA00 0
048 K02AA00 0.000
049 00AA00 N
050 00AA00 N
051 00AA00 N
052 00AA00 Y
053 A00AA00 Y
053 B00AA00 Y
053 C00AA00 N
054 A00AA00 Y
054 B00AA00 Y
054 C00AA00 Y
054 D00AA00 N
054 E00AA00 N
054 F00AA00 N
054 G00AA00 N
054 H00AA00 Y
054 I00AA00 N
054 J00AA00 Y
054 K00AA00 N
054 L00AA00 Y
054 M00AA00 Y
054 N00AA00 N
054 O00AA00 Y
055 A00AA00 N
055 B00AA00 N
056 00AA00 N
057 00AA00 N
058 A00AA00 N
059 00AA00 Y
060 A00AA00 Y
060 B00AA00 Y
061 00AA00 2500
062 A00AA00 Y
062 B00AA00 0.0
062 C00AA00 6.4
062 D00AA00 0.0
062 E00AA00 0.0
062 F00AA00 0.0
062 G00AA00 0.0
062 H00AA00 0.0
062 I00AA00 71.0
062 J00AA00 0.0
062 K00AA00 0.0
062 L00AA00 21.6
062 M00AA00 0.0
<PAGE> PAGE 7
062 N00AA00 0.0
062 O00AA00 0.0
062 P00AA00 0.0
062 Q00AA00 1.0
062 R00AA00 0.0
063 A00AA00 60
063 B00AA00 0.0
064 A00AA00 Y
064 B00AA00 N
066 A00AA00 N
067 00AA00 N
068 A00AA00 N
068 B00AA00 N
069 00AA00 N
070 A01AA00 Y
070 A02AA00 N
070 B01AA00 N
070 B02AA00 N
070 C01AA00 N
070 C02AA00 N
070 D01AA00 N
070 D02AA00 N
070 E01AA00 N
070 E02AA00 N
070 F01AA00 N
070 F02AA00 N
070 G01AA00 N
070 G02AA00 N
070 H01AA00 N
070 H02AA00 N
070 I01AA00 N
070 I02AA00 N
070 J01AA00 Y
070 J02AA00 Y
070 K01AA00 Y
070 K02AA00 N
070 L01AA00 Y
070 L02AA00 Y
070 M01AA00 N
070 M02AA00 N
070 N01AA00 Y
070 N02AA00 N
070 O01AA00 Y
070 O02AA00 N
070 P01AA00 Y
070 P02AA00 N
070 Q01AA00 N
070 Q02AA00 N
070 R01AA00 N
070 R02AA00 N
071 A00AA00 0
<PAGE> PAGE 8
071 B00AA00 0
071 C00AA00 0
071 D00AA00 0
072 A00AA00 6
072 B00AA00 35221
072 C00AA00 0
072 D00AA00 0
072 E00AA00 0
072 F00AA00 2277
072 G00AA00 477
072 H00AA00 0
072 I00AA00 766
072 J00AA00 92
072 K00AA00 124
072 L00AA00 117
072 M00AA00 28
072 N00AA00 52
072 O00AA00 0
072 P00AA00 0
072 Q00AA00 0
072 R00AA00 15
072 S00AA00 9
072 T00AA00 0
072 U00AA00 0
072 V00AA00 0
072 W00AA00 83
072 X00AA00 4040
072 Y00AA00 895
072 Z00AA00 32076
072AA00AA00 0
072BB00AA00 0
072CC01AA00 0
072CC02AA00 0
072DD01AA00 32076
072DD02AA00 0
072EE00AA00 0
073 A01AA00 0.0300
073 A02AA00 0.0000
073 B00AA00 0.0000
073 C00AA00 0.0000
074 A00AA00 6200
074 B00AA00 0
074 C00AA00 1314223
074 D00AA00 14000
074 E00AA00 0
074 F00AA00 0
074 G00AA00 0
074 H00AA00 0
074 I00AA00 0
074 J00AA00 0
074 K00AA00 0
<PAGE> PAGE 9
074 L00AA00 4130
074 M00AA00 0
074 N00AA00 1338554
074 O00AA00 0
074 P00AA00 572
074 Q00AA00 0
074 R01AA00 0
074 R02AA00 0
074 R03AA00 0
074 R04AA00 6037
074 S00AA00 0
074 T00AA00 1331945
074 U01AA00 1332200
074 U02AA00 0
074 V01AA00 1.00
074 V02AA00 0.00
074 W00AA00 0.9998
074 X00AA00 58816
074 Y00AA00 0
075 A00AA00 1245087
075 B00AA00 0
076 00AA00 0.00
077 A000000 Y
077 B000000 N
077 C000000 Y
077 D000000 Y
077 E000000 N
077 F000000 N
077 G000000 N
077 H000000 N
077 I000000 N
077 J000000 N
077 K000000 Y
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 Y
077 Q020000 N
077 Q030000 N
078 000000 N
080 C00AA00 0
081 B00AA00 0
082 B00AA00 0
083 B00AA00 0
084 B00AA00 0
086 A010000 0
086 A020000 0
086 B010000 0
086 B020000 0
<PAGE> PAGE 10
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
024 000100 Y
SIGNATURE MARYANNE ROEPKE
TITLE TREASURER
