That was over 36 years ago in 1985.
Today he is 50, and has starred in 89 movies in total, 85 since The Goonies was released.
In The Goonies, I think Sean Astin looks:
The Goonies scores 7.4 out of 10 on The Movie Database.
Sean Astin's first acting role was as 'Brian Reynolds' in Please Don't Hit Me, Mom, released in 1981 when he was 10.