Celebrities Discuss Their Most Difficult Acting Roles It may feel difficult sitting on your couch, lifting a remote, and pressing “play” to start a movie, but for the actors in front of the camera, it can be even harder. The Onion asked some of Hollywood’s biggest celebrities about their most difficult roles on and off the silver screen. Advertisement Christian Bale, on Vice: “I spent months researching Dick Cheney, fully immersing myself in the ‘Controversy Section’ of his Wikipedia page. That’s when I learned about 9/11.” Advertisement Lin Manuel Miranda, on Hamilton: “Ethically, I think the hardest part of playing Alexander Hamilton was allowing people to pay me to sing and dance like a little baby boy.”