In 2009 , Sarsgaard starred alongside Jon Foster and Sienna Miller in the drama '' The Mysteries of Pittsburgh '' . It is an adaptation of Michael Chabon 's novel of the same name . In the movie , Sarsgaard plays Cleveland , the rebellious bisexual boyfriend of Miller 's character . '' The Mysteries of Pittsburgh '' premiered at the 2008 Sundance Film Festival . His next film appearance was in the thriller '' Orphan '' , where he and Vera Farmiga play a married couple who lose a baby and adopt a nine-year-old girl , who is not as innocent as she claims to be . Furthermore , in the same year , Sarsgaard starred as David in Lone Scherfig 's coming of age film '' An Education '' . The role required Sarsgaard to speak in a British accent . '' An Education '' drew favorable reviews from critics . According to '' Variety '' , " Sarsgaard ... marvelously expresses the savoir faire that has such an impact on Jenny Carey Mulligan . " Sarsgaard played a federal agent in the action comedy film '' Knight and Day '' , released in June 2010 , in which he appeared alongside Tom Cruise and Cameron Diaz . In February 2010 , it was announced that Sarsgaard had been cast as villain Hector Hammond in the superhero film '' Green Lantern '' . The film was released in 2011
2008 Sundance Film Festival
2008 Sundance Film Festival
Peter Sarsgaard