That was over 18 years ago in 2003.
Today she is 47, and has starred in 18 movies in total, 7 since American Wedding was released.
In American Wedding, I think Alyson Hannigan looks:
American Wedding scores 6 out of 10 on The Movie Database.
Alyson Hannigan's first acting role was as 'Patty Stubbs (as Allison Hannigan)' in Impure Thoughts, released in 1986 when she was 12.