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 Guest Star Brian Posehn Bert Guest Star Swati Kapila Ruchi Guest Star Elka Rodriguez Rose Lady Guest Star Chuck Lorre Executive Producer Bill Prady Executive Producer Steven Molaro Executive Producer Steve Holland Writer Anthony Del Broccolo Writer Adam Faberman Writer Eric Kaplan Writer Maria Ferrari Writer Tara Hernandez Writer Mark Cendrowski Director