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 John Amos Percy Fitzwallace Actor Lily Tomlin Deborah Fiderer Actor Elisabeth Moss Zoey Bartlet Actor Kathleen York Andrea Wyatt Guest Star Danica McKellar Elsie Snuffin Guest Star Renee Estevez Nancy Guest Star Trent Ford Jean Paul Guest Star NiCole Robinson Margaret Guest Star Claire Coffee Cassie Tatum Guest Star Kim Webster Ginger Guest Star Kris Murphy Katie Witt Guest Star Joshua Malina Will Bailey Guest Star Catherine Kwong Lauren Chin 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 Vincent Misiano Director