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 Lily Tomlin Deborah Fiderer Guest Star NiCole Robinson Margaret Guest Star Sam Robards Greg Brock Guest Star Allison Smith Mallory O'Brien Guest Star Makram Khoury Palestinian Chairman Nizar Farad Guest Star Armin Mueller-Stahl Israeli Prime Minister Efraim "Eli" Zahavy Guest Star Steven Culp Speaker of the House Jeff Haffley Guest Star H. Richard Greene Senator Robert Royce Guest Star John Wells Executive Producer