Sheldon Cooper is a fictional character from the popular television series The Big Bang Theory. Portrayed by actor Jim Parsons, Sheldon is a highly intelligent but socially awkward theoretical physicist known for his strict routines and lack of understanding of social norms. His character often provides comic relief through his eccentric behavior and unique catchphrases. Sheldon is also known for his love of comic books, video games, and his obsession with science. His relationships with friends, particularly Leonard Hofstadter, Penny, and Howard Wolowitz, showcase his growth and development throughout the series, making him one of the most beloved characters in modern television.