131286
SUPPLEMENT TO THE PROSPECTUS
DATED APRIL 30, 1999
NORTHWESTERN MUTUAL SERIES FUND, INC.
Henry D. Cavanna, Managing Director of J.P. Morgan
Investment, is solely responsible for the Growth and Income
Stock Portfolio. Mr. Cavanna joined J.P. Morgan in 1971,
and is a senior U.S. equity portfolio manager in the U.S.
Equity and Balanced Accounts Group. He received his B.A.
degree from Boston College and L.L.B. degree from the
University of Pennsylvania. He also has primary
responsibility for the Growth and Income Stock Fund of Mason
Street Funds, Inc.
The date of this Prospectus Supplement is November 15, 1999.
