Matthew Lillard lived with his family in Tustin, California, from first grade to high school graduation. The summer after high school, he was hired as an extra for Ghoulies III: Ghoulies Go to College. Matthew was the MC of the Nickelodeon program Skate TV in 1989. He attended the American Academy of Dramatic Arts in Pasedena, California. Along with a friend, Matthew started the Mean Street Ensemble theater company that functioned until 1991, when Matthew moved to New York to attend the theater school Circle in the Square.

Manager Bill Treusch got Matthew auditions for Serial Mom. Matthew was cast as Chip and began another theater company called the Summoners.
Scooby-Doo was his 4th movie with Freddie Prinz Jr.
One younger sister, Amy. Dated Neve Campbell. Daughter Addison Grace was born June 13, 2002 in Los Angeles. Scooby-Doo was his 4th movie with Freddie Prinze Jr.. Essentially started his career playing the son of a sadistic killer (Kathleen Turner in Serial Mom), and then played a sadistic killer himself in _Scream (1996)_ . Was classmates with Paul Rudd at American Academy of Dramatic Arts Attended Fullerton College in Fullerton, California, for a brief time with the theater department. As of 2004, Matthew has worked (co-starred) with actor Freddie Prinze Jr. five times: Wing Commander: Space Will Never Be the Same, Summer Catch, She's All That, Scooby-Doo and Scooby Doo 2: Monsters Unleashed. Second daughter, Macey Lyn, was born October 19, 2004 in Los Angeles. Shares a birthday with The O.C. star Mischa Bartonformer Olympian Mary Lou Retton and Tatyana Ali.