That was over 38 years ago in 1983.
Today he is 69, and has starred in 103 movies in total, 88 since Return of the Jedi was released.
In Return of the Jedi, I think Mark Hamill looks:
Return of the Jedi scores 7.9 out of 10 on The Movie Database.
Mark Hamill's first acting role was as 'Ken Newkirk' in Sarah T. - Portrait of a Teenage Alcoholic, released in 1975 when he was 23.