Adamson attended the American Academy of Dramatic Arts until 2005.
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He has portrayed the roles of Philosophy Sanders on the television series Hollywood Heights and Charles Antoni on Lincoln Heights. He currently stars as Noah Newman on the The Young and the Restless. His first role was in the series Cold Case as a Fraternity brother of a murder suspect.
He also guest-starred in the series lieutenant"s Always Sunny in Philadelphia and had a part in the horror movie Doctor Chopper.
From 2007 to 2009, he portrayed teenager Charles Antoni on the American Broadcasting Company Family drama Lincoln Heights. In 2009, he starred as "Donny" in the Disney Channel Original Movie Princess Protection Program alongside Disney stars Demi Lovato and Selena Gomez.
He also guest-starred on Disney"s Sonny With a Chance. On August 24, 2012, Adamson replaced his former Princess Protection Program co-star Kevin G. Schmidt as Noah Newman on the Columbia Broadcasting System Daytime soap opera The Young and the Restless.
He taped his first scenes on September 4, for a first appearance on October 1.