Jim Parsons may forever be remembered as Sheldon Cooper, but the actor has admitted that his time on The Big Bang Theory was far more emotionally demanding than fans realised. Looking back at his 12-season journey on the hit sitcom, Parsons revealed that despite enjoying enormous success, he often felt overwhelmed, unhappy and under constant pressure.

Jim Parsons reflects on Big Bang Theory years

Speaking on the All Out with Jon Dean podcast, the actor reflected on the expectations that came with starring in one of television's most successful comedy series. Parsons said he constantly felt as though he had to keep everything together and believed that the show's success depended on his relentless work ethic.