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 Emily Procter Ainsley Hayes Actor Timothy Busfield Danny Concannon Actor Marlee Matlin Joey Lucas Guest Star Gregory Alan Williams Robbie Mosley Guest Star Kathryn Joosten Mrs. Landingham Actor Devika Parikh Bonnie Guest Star Anna Deavere Smith Nancy McNally Guest Star Peter James Smith Ed Guest Star NiCole Robinson Margaret Guest Star Kim Webster Ginger Guest Star Kris Murphy Katie Witt Guest Star Aaron Sorkin Executive Producer, Writer Thomas Schlamme Executive Producer, Director John Wells Executive Producer Kristin Harms Producer Llewellyn Wells Producer Kevin Falls Writer Paul Redford Writer Christopher Misiano Director Alex Graves Director Michael Engler Director Jeremy Kagan Director Ken Olin Director Lou Antonio Director Bill Johnson Director Laura Innes Director Robert Berlinger Director Scott Winant Director Jessica Yu Director