Oliver Oken is a fictional character from the Disney Channel series Hannah Montana. He is portrayed by actor Mitchel Musso and serves as one of the main characters and best friends of Miley Stewart, who is secretly the pop star Hannah Montana. Oliver is known for his humorous personality and loyalty to his friends. In the show, Oliver often finds himself in various comedic situations, balancing his life as a regular teenager with the challenges that come from being friends with a famous celebrity. His character adds depth to the series, showcasing themes of friendship and the struggles of adolescence.