Chuck Lorre Creator, Executive Producer Bill Prady Creator, Executive Producer, Writer Johnny Galecki Leonard Hofstadter Actor Jim Parsons Sheldon Cooper Actor Kaley Cuoco Penny Actor Simon Helberg Howard Wolowitz Actor Kunal Nayyar Raj Koothrappali Actor Sara Gilbert Actor Octavia Spencer Octavia Guest Star Elena Campbell-Martinez Maria Guest Star Livia Treviño Lourdes Guest Star Steven Molaro Writer, Supervising Producer Lee Aronsohn Writer, Executive Producer David Goetsch Writer, Executive Producer Mark Cendrowski Director Eric Kaplan Executive Producer Kristy Cecil Associate Producer Peter Chakos Producer, Film Editor Kelly Lee Producer Tim Doyle Consulting Producer Stephen Engel Consulting Producer Jennifer Glickman Consulting Producer Richard Rosenstock Consulting Producer Mona Garcea Coordinating Producer Nikki Valko Casting