Roger Elliston III is a young, wealthy boy who shares most of Sharpay's personality and appears in Sharpay's Fabulous Adventure, where he and Sharpay compete with each other to win a role for their dogs. He is portrayed by Bradley Steven Perry.
He continuously attempts to win the role for his dog, Countess, by cheating. Eventually, he and Sharpay are forced to come together to reveal Amber Lee Adams's true image to the world. Roger and Sharpay reconcile when she suggests that both dogs play the lead role.