Martin Sheen President Josiah "Jed" Bartlet Actor Stockard Channing Abigail "Abbey" Bartlet Actor John Spencer Chief of Staff Leo McGarry Actor Bradley Whitford Dep. Chief of Staff Josh Lyman Actor Allison Janney Press Secretary Claudia Jean "C.J." Cregg Actor Richard Schiff Communications Dir. Toby Ziegler Actor Dulé Hill Charlie Young Actor Janel Moloney Donna Moss Actor Joshua Malina Will Bailey Actor Mary McCormack Kate Harper Actor Lily Tomlin Deborah Fiderer Guest Star Janeane Garofalo Louise Thornton Guest Star Nina Siemaszko Ellie Bartlet Guest Star Jimmy Smits Matthew Santos Guest Star Kristin Chenoweth Annabeth Schott Guest Star Matthew Del Negro Bram Howard Guest Star Dianna Maria Riva Edie Ortega Guest Star Steve Ryan Secretary of Defense Miles Hutchinson Guest Star Alan Alda Senator Arnold Vinick Actor Max Mayer Director John Wells Executive Producer Aaron Sorkin Writer Debora Cahn Writer Josh Singer Writer Thomas Schlamme Producer