Joyce Hyser was 21 in The Hollywood Knights when she played the character 'Brenda Weintraub'.
That was over 44 years ago in 1980.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 66, and has starred in 13 movies in total, 12 of those since The Hollywood Knights was released.
In The Hollywood Knights, I think Joyce Hyser looks: