Johnny Galecki Leonard Hofstadter Actor Jim Parsons Sheldon Cooper Actor Kaley Cuoco Penny Actor Simon Helberg Howard Wolowitz Actor Kunal Nayyar Raj Koothrappali Actor Mayim Bialik Amy Farrah Fowler Actor Melissa Rauch Bernadette Rostenkowski Actor Kevin Sussman Stuart Bloom Guest Star Bob Newhart Arthur Jeffries Guest Star Wil Wheaton Himself Guest Star Jeff Witzke Moviegoer Guest Voice Chuck Lorre Executive Producer Bill Prady Executive Producer Steven Molaro Executive Producer, Writer Tara Hernandez Writer Eric Kaplan Writer Steve Holland Writer Jim Reynolds Writer Maria Ferrari Writer Mark Cendrowski Director