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 Lily Tomlin Deborah Fiderer Guest Star NiCole Robinson Margaret Guest Star Kim Webster Ginger Guest Star Mary-Louise Parker Amy Gardner Guest Star John Amos Percy Fitzwallace Guest Star Danica McKellar Elsie Snuffin Guest Star Kris Murphy Katie Witt Guest Star Peter James Smith Ed Guest Star Devika Parikh Bonnie Guest Star Renee Estevez Nancy 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 John David Coles Director Vincent Misiano Director Alex Graves Director Christopher Misiano Director Eli Attie Writer Lesli Linka Glatter Director Mark Goffman Writer Jessica Yu Director Kevin Falls Writer Bill D'Elia Director Debora Cahn Writer Josh Singer Writer