Jeffrey Kenton Duty is an American actor, singer, and dancer. He is best known for his recurring role as "young Jacob" on the final season of the ABC primetime drama, Lost, and for his co-starring role as the flamboyant European exchange student, Gunther Hessenheffer on the Disney Channel comedy series, Shake It Up, and Matt Prylek in the anti-bullying movie, Contest.

Shake It Up is an American sitcom that originally aired on Disney Channel from November 7, 2010, to November 10, 2013. Created by Chris Thompson and starring Bella Thorne and Zendaya, the show follows the adventures of CeCe Jones and Rocky Blue (Zendaya) as they star as background dancers on a local show, Shake It Up Chicago. It also chronicles their misadventures on and off-set and their troubles and rising social status at school. Davis Cleveland, Roshon Fegan, Adam Irigoyen, Kenton Duty, and Caroline Sunshine play other main characters in the series. The show's original concept was for Disney to create a female buddy comedy with a dance aspect.