Johnny Galecki

(Leonard Hofstadter)

Jim Parsons

(Sheldon Cooper)

Kaley Cuoco

(Penny)

Simon Helberg

(Howard Wolowitz)

Kunal Nayyar

(Raj Koothrappali)

Mayim Bialik

(Amy Farrah Fowler)

Melissa Rauch

(Bernadette Rostenkowski)

Kevin Sussman

(Stuart)

Christine Baranski

(Dr. Beverly Hofstadter)

Laurie Metcalf

(Mary Cooper)

Judd Hirsch

(Dr. Alfred Hofstadter)

Keith Carradine

(Wyatt)

Katey Sagal

(Susan)

Jack McBrayer

(Randall)

Dean Norris

(Colonel Richard Williams)