Johnny Galecki
as Leonard Leakey Hofstadter
Jim Parsons
as Sheldon Lee Cooper
Simon Helberg
as Howard Joel Wolowitz
Kunal Nayyar
as Rajesh Ramayan Koothrappali
Kaley Cuoco
as Penny
Melissa Rauch
as Bernadette Marianne Rostenkowski
Mayim Bialik
as Amy Farrah Fowler
Kevin Sussman
as Stuart Bloom
Laura Spencer
as Emily Sweeney
Sara Gilbert
as Leslie Winkle