Musso is best known his role as Oliver Oscar Oken in Disney Channel's Hannah Montana, along with his other co-stars: Miley Cyrus, Billy Ray Cyrus, Emily Osment, Jason Earles, and Moises Arias. He also plays Jeremy in Phineas and Ferb, a boy whom Phineas's sister, Candace (played by Ashley Tisdale) has a crush on. Other acting credits include Raymond Figg in the Disney Channel Original Movie, Life Is Ruff, and the voice of Aang in the unaired version of the pilot episode of Avatar: The Last Airbender. Musso was the voice of DJ in the Academy Award-nominated film, Monster House. He also is expected to film The Hannah Montana Movie, to be released in April 2009, alongside Miley Cyrus, Jason Earles, Billy Ray Cyrus, Moises Arias, and Emily Osment. Musso was in the first Disney Channel Games in summer 2006 on the Green Team, in the summer of 2007 he was on the Red Team, and in the summer of 2008 he was on the Red (inferno) team. He also starred in the TV movie Walker, Texas Ranger: Trial by Fire alongside Chuck Norris.
"The Raven Tour has been postponed....and it's not April Fools.... I know it's hard to believe...try being me. But you know what? The band and dancers and myself have worked really hard to create an Incredible Show for you guys and I know that something great is just around the corner. We already have offers coming in, and as soon as I know details for a new tour, I will pass them along.
Mitchel is now on a nationwide tour visiting several states. Rumors that he would be touring again with Raven Symone have not been confirmed.
|Disney Channel Games||Himself||Red Team : Status:Mitchel the Muscle||2009||Hatcing Pete||Cleatis Poole||Main Cast Character|
|2009||Hannah Montana: The Movie||Oliver Oken||Main Cast Character|
|2008||Disney channel Games 2008||Himself||Red Team (Inferno)|
|2008||Phineas and Ferb||Jeremy Johnson||Candace's crush|
|Disney Channel Games 2007||Himself||Red Team|
|2007||Shorty McShorts' Shorts||Kevin||Voice only, in the episode Mascot Prep|
|2006||Disney Channel Games 2006||Himself||Green Team|
|2006 — present||Hannah Montana||Oliver Oken/Mike Standley||Main Cast Character|
|2006||Monster House||DJ||Voice and thousand dots actor|
|2005||Walker Texas Ranger: Trial by Fire||Josh Whitley|
|Life is Ruff||Raymond Figg||Disney Channel Original Movie|
|Avatar: The Last Airbender||Aang||Voice Over, unaired episode|
|Hidden Howie||Alex Mandel|
|2003||Oliver Beene||One Nad|
|2002||Am I Crushed?||Richie|
|2002||The Keyman||Cub Scout|