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 Timothy Busfield Danny Concannon Actor Elisabeth Moss Zoey Bartlet Actor Taye Diggs Secret Service Agent Wesley Guest Star Kimberly Bigsby Molly O'Connor Guest Star Commodore James Marine Captain Guest Star Shannon Marshall Randy Weathers Guest Star Ralph Meyering Jr. Tom Guest Star Mary-Louise Parker Amy Gardner Guest Star NiCole Robinson Margaret Guest Star John Amos Percy Fitzwallace Guest Star Anna Deavere Smith Nancy McNally Guest Star Michael O'Neill Secret Service Agent Ron Butterfield Guest Star Kathleen York Andrea Wyatt Guest Star Trent Ford Jean Paul Guest Star Joshua Malina Will Bailey Guest Star Aaron Sorkin Executive Producer, Writer Thomas Schlamme Executive Producer John Wells Executive Producer Neal Ahern Jr. Producer Paul Redford Producer Kristin Harms Producer Llewellyn Wells Producer Alex Graves Director