Blythe Danner was 26 in George M! when she played the character 'Agnes Cohan'.
That was over 53 years ago in 1970.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 80, and has starred in 85 movies in total, 84 of those since George M! was released.
In George M!, I think Blythe Danner looks: