Additionally, Stewart, along with Fivel, will host two Free Concerts to End Child Abuse on behalf of national non-profit organization, Childhelp.
He appeared in a PETA advert campaign, encouraging people to adopt animals rather than to buy them from pet stores.
During 2006–2010 Stewart appeared or starred in several independent, direct-to-video, or TV films.
He also hosted six episodes of the children's show Blue Dolphin Kids in Hawaii, and did stunt work on several films including the 2006 film Zoom and the 2007 film Beowulf. Stewart also toured with Hannah Montana/Miley Cyrus on her Best of Both Worlds Tour featuring the Jonas Brothers and in the Camp Rock Freestyle Jam concert series.
Stewart toured with Hannah Montana/Miley Cyrus in her Best of Both Worlds Tour featuring the Jonas Brothers and appeared in the Target commercials with the same band and Miley Cyrus Danimals, and also toured in the Camp Rock Freestyle Jam concert series.
He recorded the opening theme for the Disney Channel Games 2008 titled "Let's Go!
Directed by Sean Mc Namara Stewart starred in the 2015 Disney Channel original movie Descendants as Jay, the son of Jafar.
He reprised his role in the 2017 sequel, Descendants 2.Obviously, I've been on sets before but nothing as big as 'Twilight.' You forget sometimes that you're on set of one of the biggest movies ever- so when you just sit back and think about it its just so incredible. He is known for playing Seth Clearwater, a shapeshifter in The Twilight Saga, Warpath in X-Men: Days of Future Past, and Jay in the Disney television films Descendants and Descendants 2.", and in 2010 "Under the Sea" (from The Little Mermaid) for the Disney recompilation disc Disney Mania 7.He could also be seen appearing in various magazines and billboards promoting clothes, as well as promoting Wii Fit and Hot Wheels. During 2006–2008, he was a member of the musical group T-Squad.He is also part of MDA's "Make a Muscle, Make a Difference" PSA campaign, being featured in print and TV advertisements.