Cher was 18 in Wild on the Beach when she played the character 'Herself'.
That was over 59 years ago in 1965.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 77, and has starred in 68 movies in total, 66 of those since Wild on the Beach was released.
In Wild on the Beach, I think Cher looks: