Mason Wilson Gamble (born January 16, 1986) is an American actor known for his portrayal of Dennis Mitchell in the 1993 film Dennis the Menace, a role he got after beating out a reported 20,000 children who had auditioned, and as Jason Schwartzman's sidekick, Dirk Calloway, in Wes Anderson and Owen Wilson's critically acclaimed 1998 film Rushmore.