Martin Sheen President Josiah "Jed" Bartlet Actor Bradley Whitford Dep. Chief of Staff Josh Lyman Actor John Spencer Chief of Staff Leo McGarry 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 Mary McCormack Kate Harper Guest Star Lily Tomlin Deborah Fiderer Guest Star John Amos Percy Fitzwallace Guest Star Anna Deavere Smith Nancy McNally Guest Star Sam Robards Greg Brock Guest Star Steven Culp Speaker of the House Jeff Haffley Guest Star Jesse Bradford Ryan Pierce Guest Star Joshua Malina Will Bailey Guest Star Peter James Smith Ed Guest Star John Wells Executive Producer