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 Neil Gaiman Himself Guest Star Lauren Lapkus Denise Guest Star Patrick Daniel Grant Guest Star Chuck Lorre Executive Producer Bill Prady Executive Producer, Writer Steven Molaro Executive Producer Steve Holland Writer Eric Kaplan Writer Maria Ferrari Writer Andrew Gordon Writer Tara Hernandez Writer Mark Cendrowski Director