Nils Allen "Booboo" Stewart Jr. (born January 21, 1994) is an American actor. 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.
Nils Allen Stewart Jr. was born in Beverly Hills, California. His father, Nils Allen Stewart, is a professional stuntman. He has Japanese, Chinese, and Korean ancestry on his mother's side and Russian, Scottish, and Blackfoot ancestry on his father's side. Stewart was in a band named "Echoes of Angels" and toured with his mother, Renee Stewart, and grandmother, who were known as "TSC" (The Stewart Clan).
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 (from The Little Mermaid)" 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 Lab Rats: Elite Force.