Sheldon Cooper

Dr. Sheldon Lee Cooper is a fictional character on the CBS television series The Big Bang Theory, portrayed by actor Jim Parsons.

A Caltech theoretical physicist, Sheldon is Leonard Hofstadter's (Johnny Galecki) roommate and colleague. They live across the hallway from Penny (Kaley Cuoco).

Sheldon is distinct for his overtly intellectual personality: he is calculating and cynical, he exhibits a strict adherence to routine, a lack of understanding of irony