Reprised his role as Thomas in "Maze Runner: The Scorch Trials"
Landed his breakout role as Thomas in "The Maze Runner"
Made his feature film debut in "High Road"
Landed the role of Stiles on MTV's "Teen Wolf"
After appearing in a series of widely popular YouTube videos, O'Brien was able to land his very first acting manager.
O'Brien studied sports broadcasting at Syracuse University and seriously considered a career as a play-by-play announcer.
"I never really understood why actors get paid so much money. But now I feel like it's because they have to sacrifice their lives sometimes, you know? Some people may want that, but I said it: I'm shy and reserved, and there is nothing about me that wants to throw myself out to the world like that. I don't resent those people or anything, but it's hard to feel like you're a person. You go around everywhere and people treat you like a doll." - from www.elle.com, September 30, 2014