Anthony Edwards Dr. Mark Greene Actor George Clooney Dr. Doug Ross Actor Sherry Stringfield Dr. Susan Lewis Actor Eriq La Salle Dr. Peter Benton Actor Noah Wyle Dr. John Carter Actor Julianna Margulies Head Nurse Carol Hathaway Actor Gloria Reuben Jeanie Boulet Actor Omar Epps Actor Laura Innes Dr. Kerry Weaver Actor Glenne Headly Guest Star Jami Gertz Guest Star Lisa Nicole Carson Guest Star John Aylward Actor Jorja Fox Dr. Maggie Doyle Guest Star Michael Beach Guest Star Ellen Crawford Guest Star Yvette Freeman Guest Star Kirsten Dunst Charlie Chiemingo Guest Star Deborah May Mary Cain Guest Star Conni Marie Brazelton Nurse Connie Oligario Guest Star Michael Crichton Executive Producer John Wells Executive Producer