Barbra Streisand was 22 in My Name Is Barbra 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 82, and has starred in 63 movies in total, 61 of those since My Name Is Barbra was released.
In My Name Is Barbra, I think Barbra Streisand looks: