Jason Daniel Earles is an American actor, comedian, and martial artist, known for his role as Jackson Stewart in the Disney Channel sitcom, Hannah Montana, and Rudy Gillespie in the Disney XD series, Kickin' It. He was also on the Blue Team in the Disney Channel games of 2006. Additionally, he played Grady Spaggett in Phil of the Future, Thomas Gates in National Treasure, and Hunter in Aaron Stone. He also voiced Spudnick in Space Buddies, himself in Yin Yang Yo!, Kevin and Hamster Boy in Fish Hooks, and Brent in Randy Cunningham: 9th Grade Ninja. He plays Dax Fraggins in Best Friends Whenever.