Martin Sheen President Josiah "Jed" Bartlet Actor Stockard Channing Abigail "Abbey" Bartlet Actor John Spencer Chief of Staff Leo McGarry Actor Bradley Whitford Dep. Chief of Staff Josh Lyman Actor Allison Janney Press Secretary Claudia Jean "C.J." Cregg Actor Richard Schiff Communications Dir. Toby Ziegler Actor Dulé Hill Charlie Young Actor Janel Moloney Donna Moss Actor Joshua Malina Will Bailey Actor Mary McCormack Kate Harper Actor Jimmy Smits Matthew Santos Guest Star Oliver Platt Oliver Babish Guest Star Marlee Matlin Joey Lucas Guest Star NiCole Robinson Margaret Guest Star Bill O'Brien Kenny Thurman Guest Star Timothy Busfield Danny Concannon Guest Star Teri Polo Helen Santos Guest Star Kristin Chenoweth Annabeth Schott Guest Star Matthew Del Negro Bram Howard Guest Star Ramon De Ocampo Otto Guest Star Dianna Maria Riva Edie Ortega Guest Star Evan Arnold Ned Guest Star Karis Campbell Ronna Guest Star Renee Estevez Nancy Guest Star John Wells Executive Producer