In "The Hangover," which went on to become the highest-grossing R-rated film of all time, his performance was lauded. Cooper who offers the most interesting variation on an old standard, playing his aggressive, cocky frat boy with a snarl of rage that masks anxiety." Cooper’s good looks suddenly came to the fore after the success of "The Hangover." He was on the cover of style magazine Details.
Cooper's portrayal of a struggling writer in the thriller Limitless (2011) and a rookie police officer in the crime drama The Place Beyond the Pines (2012) drew praise from critics.
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.
He first gained recognition as Will Tippin in the spy-action television show Alias (2001–2006), and achieved minor success with a supporting part in the comedy film Wedding Crashers (2005).
For Cooper, 2015 started on a low note with his first release of the year "Aloha" (pictured), receiving negative reviews and huge financial losses.
His second release of the year, “Burnt,” wherein he plays a formerly-addicted chef who reclaims his life, was also panned by the critics.