Don Johnson was 19 in The Magic Garden of Stanley Sweetheart when he played the character 'Stanley Sweetheart'.
That was over 54 years ago in 1970.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 74, and has starred in 68 movies in total, 63 of those since The Magic Garden of Stanley Sweetheart was released.
In The Magic Garden of Stanley Sweetheart, I think Don Johnson looks: