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 Lily'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 started the role of Chad Dylan Cooper on Sonny With a Chance opposite of Demi Lovato. He made his film debut in 17 Again playing Alex, Matthew Perry/Zac Efron's son. In 2010, Knight played teen heart-throb Christopher Wilde in the Disney Channel Original Movie Starstruck.
Knight's next project is the movie Elle: A Modern Cinderella Tale with Ashlee Hewitt. He plays Ty Parker, a singer/songwriter who's looking for a change in his music and then finds a girl recording in a studio and when she leaves him he goes on a journey to find her. Although the movie was about the girl, Elle, he played a crucial part. The movie was released in April 2010. In 2012, Knight has also continued to play his Sonny With a Chance character in the show's spinoff So Random!. In Sonny With a Chance, he played Chad Dylan Cooper, a self-proclaimed Hollywood legend. He was an egotistical and self-centered cast member of Mackenzie Falls but he has now joined the cast of So Random!. The show has not been renewed for a second season.
In 2013 he appeared as a guest star for a few episodes on Melissa & Joey as Lennox's boyfriend Zander.
Knight is now recording his first studio album and will release sometime in 2014. He signed to Hollywood Records.
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. He enjoys golfing, snowboarding and guitar. Taking his guitar skills, Sterling formed a YouTube band with fellow star and friend Matt Shively named "Connecting Channels".
He is dating Emily Osment since January 2012 till present.