Became known to audiences for playing Bucky Barnes in Captain America: The First Avenger. His role in the miniseries Political Animals earned him a Critics' Choice Television Award for Best Performance by a Supporting Actor. In 2015, he portrayed Chris Beck in the film The Martian.
He spent a year abroad studying theater at Shakespeare's Globe Theatre in London.
He did all his own Stunts in the movie The Covenant.
He dated his co-stars Leighton Meester from 2008 to 2010 and Jennifer Morrison from 2012 to 2013. Then in 2014, he began dating Actress Margarita Levieva.
He was in Darren Aronofsky's film Black Swan.
