Jonathan David Bennett (born June 10, 1981) is an American actor and television host. He is known for his roles as Aaron Samuels in the 2004 comedy film Mean Girls, Bud McNulty in 2005's Cheaper by the Dozen 2, the title character in the 2009 direct-to-DVD comedy Van Wilder: Freshman Year, and his recurring role as Casey Gant in the mystery drama Veronica Mars. He was the host of the Food Network series Halloween Wars, and he previously hosted Cake Wars.

Bennett made his Broadway debut in Spamalot on January 23, 2024, playing Sir Robin, Guard 1 and Brother Maynard.