Which film was Ben Stiller's directorial debut?

Explanation

Like many other actors, Ben Stiller began his career as a stand-up comic. He is best known for his work as an actor, but debuted as a film director back in 1994 with the film "Relaity Bites", starring himself and Winona Ryder. He has since directed a number of movies, including "The Cable Guy" with Jim Carrey and "Tropic Thunder", in which he played the role of Tugg Speedman opposite Jack Black and Robert Downey Jr.