That was over 19 years ago in 2002.
Today he is 45, and has starred in 29 movies in total, 15 since Scooby-Doo was released.
In Scooby-Doo, I think Freddie Prinze Jr. looks:
Scooby-Doo scores 5.4 out of 10 on The Movie Database.
Freddie Prinze Jr.'s first acting role was as 'Joey Bost' in To Gillian on Her 37th Birthday, released in 1996 when he was 20.