Martin Sheen President Josiah "Jed" Bartlet Actor John Spencer Chief of Staff Leo McGarry Actor Bradley Whitford Dep. Chief of Staff Josh Lyman Actor Richard Schiff Communications Dir. Toby Ziegler Actor Allison Janney Press Secretary Claudia Jean "C.J." Cregg Actor Dulé Hill Charlie Young Actor Janel Moloney Donna Moss Actor Stockard Channing Abigail "Abbey" Bartlet Actor Joshua Malina Will Bailey Actor John Goodman Glenallen Walken Guest Star Annabeth Gish Elizabeth Bartlet Westin Guest Star Lily Tomlin Deborah Fiderer Guest Star NiCole Robinson Margaret Guest Star Kim Webster Ginger Guest Star John Amos Percy Fitzwallace Guest Star Anna Deavere Smith Nancy McNally Guest Star Clark Gregg FBI Special Agent Michael Casper Guest Star Timothy Busfield Danny Concannon Guest Star Nina Siemaszko Ellie Bartlet Guest Star Željko Ivanek Steve Atwood Guest Star Steven Eckholdt Doug Westin Guest Star Peter James Smith Ed Guest Star Thomas Kopache Assistant Secretary of State Bob Slatterly Guest Star Geoff Pierson Senate Minority Leader Tripplehorn Guest Star John Wells Executive Producer