Leo Richard Howard (born July 13, 1997) is an American young actor who is best known for his role as Leo Little on the Disney Channel short television series, Leo Little's Big Show, with co-starG. Hannelius as Amy Little which was cancelled so that Leo could focus on Kickin' It. In addition to acting, Howard is also known for hismartial arts abilities. He has incorporated his Wushu and Karateskills into many of his film and television roles. He plays the main role of Jack on the Disney XD sitcom Kickin' It.