That was over 37 years ago in 1984.
Today he is 50, and has starred in 73 movies in total, 67 since Gremlins was released.
In Gremlins, I think Corey Feldman looks:
Gremlins scores 6.9 out of 10 on The Movie Database.
Corey Feldman's first acting role was as 'Boy at Museum' in Time After Time, released in 1979 when he was 8.