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)

Bill Gates

(Himself)