Jim Parsons as Sheldon Cooper
Johnny Galecki as Leonard Hofstadter
Kaley Cuoco as Penny
Kunal Nayyar as Rajesh Koothrappali
Simon Helberg as Howard Wolowitz
Melissa Rauch as Bernadette Rostenkowski
Mayim Bialik as Amy Farrah Fowler
Laura Spencer as Emily Sweeney
Sara Gilbert as Leslie Winkle
Kevin Sussman as Stuart Bloom
John Ross Bowie as Barry Kripke
Carol Ann Susi as Debbie Wolowitz