Radcliffe also performed at the Noël Coward Theatre in the stage play revival of Martin McDonagh 's dark comedy The Cripple of Inishmaan as the lead , Billy Claven , for which he won the WhatsOnStage Award for Best Actor in a Play . In 2015 , Radcliffe starred as Igor in a science fiction horror film Victor Frankenstein directed by Paul McGuigan and written by Max Landis , which was based on contemporary adaptations of Mary Shelley 's 1818 novel Frankenstein . In 2016 , Radcliffe portrayed Manny , a talkative corpse , in the indie film Swiss Army Man .