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Joshua Baret Henderson (born October 25, 1981) is an American actor, model, and singer. Henderson is best known for his lead role as John Ross Ewing III in the TNT revival of Dallas (2012–2014). He played Austin McCann on the ABC television series Desperate Housewives (2006–2007), and appeared in films like Step Up. He became widely known after his appearance on The WB singing competition show Popstars 2, where he was one of the winners selected to be a member of the pop group Scene 23. Wikipedia