Cooper appeared in Forbes Celebrity 100 on two occasions and Time Cooper enrolled in the MFA program at the Actors Studio, New York City in 2000.His career began with a guest role in the television series Sex and the City in 1999 and his film debut came two years later in Wet Hot American Summer.I prided myself in taking whatever was in the fridge and turning it into lasagna." Cooper says that his parents were initially apprehensive of his career choice, but they eventually changed their perceptions when they saw Cooper play the part of Joseph Merrick in an excerpt from the play The Elephant Man.Cooper's cinematic debut came in the ensemble comedy Wet Hot American Summer (2001), a film that takes place at a fictional summer camp in 1981.In the Neil Burger-directed film, he played a struggling writer who is introduced to a nootropic drug that gives him the ability to fully utilize his brain and vastly improve his lifestyle.though the critic for Time complimented him: "Cooper gives a knowing performance: he's both the peacock and the parody of one.
He excelled at basketball, and enjoyed cooking: "I used to have buddies come over after kindergarten and I'd cook them food.Despite positive reviews for the series, the show was canceled after only four episodes due to low ratings.Cooper landed the lead role in the Ryuhei Kitamura-directed supernatural film The Midnight Meat Train (2008), based on Clive Barker's 1984 short story of the same name.He's blessed with good looks and fantastic timing, the kind that makes every line funnier, even the small asides." The year 2012 saw Cooper star in four films—The Words, Hit and Run, The Place Beyond the Pines, and Silver Linings Playbook.
The mystery drama The Words failed commercially, as did the action comedy Hit and Run.
In 2014, he portrayed Joseph Merrick in a Broadway revival of The Elephant Man, garnering a nomination for the Tony Award for Best Actor in a Play.