The news that Kristen Stewart would be playing a Guantanamo Bay guard came as something of a surprise, considering that the actress is best known for playing a girl moon-eyed over a sparkling vampire. But reviews out of Sundance explained that Stewart's performance in Camp X-Ray is not something to dismiss, and the trailer out today indicates that as well. 

The trailer shows how Stewart's character becomes close to a detainee played by Peyman Moaadi, and while she's not unrecognizable, Stewart also doesn't seem out of place. In David Rooney's Hollywood Reporter review out of Sundance he wrote that " a powerfully internalized performance from Kristen Stewart, delivering perhaps her best screen work to date," while Matt Patches at Vanity Fair explained that Stewart is "shedding a skin and allowing herself to be tapped for talent. "