Nils Allen Stewart Jr. was born in Beverly Hills, California. His father, Nils Allen Stewart, is a professional stuntman. He has a younger sister, Fivel, who is also an actress, and recently appeared in the second season of the Netflix original dramedy Atypical. His mother has Japanese, Chinese, and Korean ancestry and his father has Russian, Scottish, and Blackfoot ancestry. Stewart was a former member of T-Squad, a Disney hip-hop/pop group, and performed with his sisters, Fivel and Maegan, as part of "TSC".
Career
Early career
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. He had roles on episodes of Steve Harvey's Big Time Challenge, ER, Dante's Cove, Everybody Hates Chris and "R.L. Stine's The Haunting Hour". 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. He recorded the opening theme for the Disney Channel Games 2008 titled "Let's Go!", and in 2010 "Under the Sea" for the Disney recompilation disc DisneyMania 7. He promoted clothes, as well as toys and games such as Wii Fit and Hot Wheels. He also played Roman in . During 2006–2008, he was a member of the musical group T-Squad.
2010–present: Theatrical debut
In 2010, Stewart appeared in the movie Logan, a coming of age story about two brothers. He portrayed Seth Clearwater in ', the third installment of The Twilight Saga film series. In 2012, Stewart starred in the movie White Frog as Nick Young, a teen with Asperger's syndrome. In 2013, he played the lead role in Running Deer, an award-winning short film produced and directed by Brent Ryan Green through Toy Gun Films. Stewart also appeared in 2014's ' acting as Warpath. In 2013, Stewart appeared in Space Warriors alongside Danny Glover, Dermot Mulroney, Josh Lucas, Mira Sorvino. Directed by Sean McNamara Stewart starred in the 2015 Disney Channel original movie Descendants as Jay, the son of Jafar. He reprised his role in the 2017 and 2019 sequels, Descendants 2 and Descendants 3, in which he played a bad boy, turned good boy.
Philanthropic activities
In 2010, he was named a Celebrity Ambassador by the Muscular Dystrophy Association. In his role, Stewart is helping raise awareness in the fight against muscle diseases. He is also part of MDA's "Make a Muscle, Make a Difference" PSA campaign, being featured in print and TV advertisements. He also travelled to Perth, Australia for the Channel 7 Telethon, raising money for the Princess Margaret Hospital for Children. Stewart and his sister Fivel also hosted free concerts on behalf of the national non-profit organization Childhelp. He appeared in a PETA campaign, encouraging people to adopt animals rather than to buy them from pet stores. He is also involved in Four Green Steps, an environmental organization based in Canada.
