Who played the role of Sheldon Cooper in The Big Bang Theory?

Jim Parsons played Sheldon Cooper in The Big Bang Theory. The character is a brilliant but socially awkward theoretical physicist whose strict routines, literal-mindedness, and signature catchphrase “Bazinga!” made him one of television’s most recognizable sitcom characters.

The Big Bang Theory premiered on CBS in 2007 and followed Sheldon, Leonard Hofstadter, Penny, Howard Wolowitz, and Raj Koothrappali. Parsons played Sheldon throughout the show’s 12-season run, which concluded in 2019. His performance earned four Primetime Emmy Awards for Outstanding Lead Actor in a Comedy Series.

The wrong options are other major cast members: Johnny Galecki played Leonard, Kaley Cuoco played Penny, and Simon Helberg played Howard. That makes this a common cast-mix-up question, since all four actors were central to the ensemble and appeared together across much of the series.

Sheldon later became the focus of the prequel Young Sheldon. Iain Armitage portrayed Sheldon as a child, while Jim Parsons narrated the series and appeared as the adult version of the character. Parsons therefore remains the canonical answer for Sheldon in the original series.