Walker was born in Santa Monica, California. He has been acting professionally since the age of 17 when he appeared in a Disney Movie of the Week in 1986. Since then Matt has made his living appearing in numerous television shows, feature films, commercials and in live venues across the country. At 19 he was cast as a series regular on the ABC drama Supercarrier starring Wendie Malick, Paul Gleason and Richard Jaeckel. Co starring roles soon followed in the feature films, Halloween 5: The Revenge of Michael Myers and Child's Play 3 and established Matt in the famed slasher movie sequel genre.
In 1995, Matt was cast as a series regular in the Fox situation comedy, The Preston Episodes with David Allen Grier, and as the star of a CBS pilot called Shock Treatment. In that same year Matt accepted a job as the director of a TBS cable television show, Dinner and a Movie. That gig turned into more directing for TBS including the shows, Movies For Guys Who Like Movies, The Man Made Movie, Movie & A Makeover and Big PlayStation Saturday.