That was over 24 years ago in 1997.
Today he is 57, and has starred in 78 movies in total, 49 since My Best Friend's Wedding was released.
In My Best Friend's Wedding, I think Dermot Mulroney looks:
My Best Friend's Wedding scores 6.4 out of 10 on The Movie Database.
Dermot Mulroney's first acting role was as 'Tim McGary' in Sin of Innocence, released in 1986 when he was 22.