Sterling Sandmann Knight (born March 5, 1989) is an American actor, singer, and dancer. He is known for his role as Chad Dylan Cooper in the Disney Channel sitcom Sonny with a Chance and its spinoff So Random!, Zander Carlson in Melissa & Joey, and Christopher Wilde in the Disney Channel Original Movie Starstruck.
Sterling Knight was born on March 5, 1989, in Hilton Head Island, South Carolina. He has a sister, Samantha Scarlett, and a brother, Spencer Shuga.
Knight began his career on stage in local productions. He made his acting debut in minor roles in Calm, Career Day, and Hi-Jinks. Knight's first role with Disney was in an episode of Hannah Montana, playing Lilly’s boyfriend Lucas, in 2007. Later in the year, Knight also appeared in two episodes of The Closer. In 2008, Knight appeared in Out of Jimmy's Head and Grey's Anatomy. In 2009, Knight played the role of Chad Dylan Cooper, an egotistical and self-centered cast member of Mackenzie Falls and self-proclaimed Hollywood legend in Sonny with a Chance. Knight made his film debut in 17 Again playing Alex O'Donnell, Matthew Perry/Zac Efron's son.