Freddie Prinze Jr. was 25 in Scooby-Doo when he played the character 'Fred Jones'.
That was over 22 years ago in 2002.
Today he is 48, and has starred in 32 movies in total, 17 of those since Scooby-Doo was released.
In Scooby-Doo, I think Freddie Prinze Jr. looks: