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 Joshua Malina Will Bailey Actor Mary-Louise Parker Amy Gardner Guest Star Ron Silver Bruno Gianelli Guest Star Christian Slater Lt. Cmdr. Jack Reese Guest Star Kathleen York Andrea Wyatt Guest Star Joanna Gleason Atty. Jordon Kendall Guest Star Tobin Bell Colonel Whitcomb Guest Star Danica McKellar Elsie Snuffin Guest Star Gina Hecht Julie Guest Star Victor Raider-Wexler Bernie Guest Star Thomas Kopache Assistant Secretary of State Bob Slatterly Guest Star Devika Parikh Bonnie Guest Star Kim Webster Ginger Guest Star Peter James Smith Ed 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 Christopher Misiano Director