At the age of 13, Kaplan toured with Jim Henson's Bear and the Big Blue House Live!
Early in his career, he was the subject of a German filmmaker's documentary called "Hollywood Kids".
He has appeared in several national commercials, including Wendy's restaurants, Yahoo!, Cingular Wireless, Simon Malls, Dairy Queen, and most recently, Honda.
He appeared in the Owen Wilson comedy Drillbit Taylor, and was cast in a leading role in Just Peck, a feature film which premiered at the Cannes Film Festival in 2009, in which he plays the best friend of the title character, played by Keir Gilchrist.
Kaplan appears as Michael in the ABC Family sitcom 10 Things I Hate About You,[1] based loosely on the 1999 film of the same name, which premiered July 7, 2009.