Rob Lowe Sam Seaborn Actor 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 Marlee Matlin Joey Lucas Guest Star Ron Silver Bruno Gianelli Guest Star Anna Deavere Smith Nancy McNally Guest Star Evan Handler Douglas Wegland Guest Star Connie Britton Connie Tate Guest Star NiCole Robinson Margaret Guest Star Bill O'Brien Kenny Thurman Guest Star Glenn Morshower Mike Chysler Guest Star Victor McCay Peter Guest Star Peter James Smith Ed Guest Star Aaron Sorkin Executive Producer, Writer Thomas Schlamme Executive Producer, Director John Wells Executive Producer Michael Hissrich Producer Alex Graves Producer Kristin Harms Producer Llewellyn Wells Producer