• Kunal Nayyar • Originally comes from New Delhi, India • He works as a particle astrophysicist at Caltech. • Shy around women and is physically unable to talk to them unless he drinks alcohol. Dr.Sheldon Cooper Penny • Kaley Cuoco • She lives across the hall from Sheldon and Leonard • She works as a waitress at The Cheesecake Factory. Dr. Rajesh Koothrappali Howard Wolowitz • Simon Helberg • Howard works as an aerospace engineer. • He is Jewish, and lives with his mother. Stage Photos Thank you for your attention! Dr.来自百度文库heldon Cooper • Jim Parsons • Originally from East Texas • A child prodigy, he possesses a master's degree, two Ph.D.s, and an IQ of 187 • He exhibits a strict adherence to routine; a lack of understanding of irony, sarcasm and humor; and a complete lack of humility. These characteristics are the main sources of his character's humor . It sounds crazy. Cast Dr. Leonard Hofstadter Dr. Rajesh Koothrappali Mr. Howard Wolowitz Dr. Sheldon Cooper Penny Dr. Leonard Hofstadter • Johnny Galecki • An experimental physicist with an IQ of 173 who received his Ph.D. • He shares an apartment with his colleague and friend-Sheldon. • A short intimate relationship with Penny