That was over 27 years ago in 1993.
Today he is 69, and has starred in 103 movies in total, 77 since Batman: Mask of the Phantasm was released.
In Batman: Mask of the Phantasm, I think Mark Hamill looks:
Batman: Mask of the Phantasm scores 7.4 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.