Zach Braff Dr. John "J.D." Dorian Actor Donald Faison Dr. Chris Turk Actor John C. McGinley Dr. Perry Cox Actor Eliza Coupe Dr. Denise Mahoney Actor Kerry Bishé Lucy Bennett Actor Michael Mosley Drew Suffin Actor Dave Franco Cole Aaronson Actor Robert Maschio Todd Guest Star Matthew Moy Trang Guest Star Ryan Biegel Clint Guest Star Nicky Whelan Maya Guest Star Larry Sullivan Eric Coleman Guest Star USC Trojan Marching Band Drumline Guest Star Mark Behar Doctor Guest Star Bill Lawrence Executive Producer Sean Russell Writer Rick Blue Director