Cast of ER Cast of ER "ER" is an American drama series that aired on NBC from September 19, 1994 until April 2, 2009. The series featured a large ensemble cast that changed dramatically over its long run. The main cast was augmented by a wealth of recurring characters and award-winning guest stars. The original starring cast consisted of Anthony Edwards as Dr. Mark Greene, George Clooney as Dr. Douglas "Doug" Ross, Sherry Stringfield as Dr. Susan Lewis, Noah Wyle as medical student (later Dr.) John Carter, and Eriq La Salle as Dr. Peter Benton. Julianna Margulies guest starred in the pilot as
Er (Cyrillic) of various languages, р represents the following sounds: The pronunciations shown in the table are the primary ones for each language; for details consult the articles on the languages. Er (Cyrillic) Er (Р р; italics: "Р р") is a letter of the Cyrillic script. It commonly represents the alveolar trill , like the "rolled" sound in the Scottish pronunciation of in "curd". The Cyrillic letter Er was derived from the Greek letter Rho (Ρ ρ). The name of Er in the Early Cyrillic alphabet was ("rĭci"), meaning "speak". In the Cyrillic numeral system, Er had a value of 100. The