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 Tim Matheson Vice President John Hoynes Actor Elisabeth Moss Zoey Bartlet Actor Kathryn Joosten Mrs. Landingham Actor Michael O'Neill Secret Service Agent Ron Butterfield Guest Star Jorja Fox Agent Gina Toscano Guest Star Anna Deavere Smith Nancy McNally Guest Star Daniel von Bargen Air Force General Ken Shannon Guest Star Michael Bryan French Hospital Administrator Guest Star Pamela Gordon Woman in Bar Guest Star Andy Umberger Cal Mathis Guest Star Jim Ortlieb Dr. Keller Guest Star NiCole Robinson Margaret Guest Star Kim Webster Ginger Guest Star Kris Murphy Katie Witt Guest Star Willie Gault Agent Madsen Guest Star Victor McCay Peter Guest Star Gary Carlos Cervantes Civilian Advisor Guest Star Chad McKnight Paramedic 4 Guest Star Aaron Sorkin Executive Producer, Writer Thomas Schlamme Executive Producer, Director John Wells Executive Producer Kristin Harms Producer Llewellyn Wells Producer