Debra Winger was 20 in Slumber Party '57 when she played the character 'Debbie'.
That was over 48 years ago in 1976.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 68, and has starred in 44 movies in total, 43 of those since Slumber Party '57 was released.
In Slumber Party '57, I think Debra Winger looks: