Martin Sheen President Josiah "Jed" Bartlet Actor John Spencer Chief of Staff Leo McGarry Actor Rob Lowe Sam Seaborn Actor Bradley Whitford Dep. Chief of Staff Josh Lyman Actor Richard Schiff Communications Dir. Toby Ziegler Actor Allison Janney Press Secretary Claudia Jean "C.J." Cregg Actor Moira Kelly Mandy Hampton Actor Dulé Hill Charlie Young Actor Janel Moloney Donna Moss Actor Elisabeth Moss Zoey Bartlet Guest Star Marlee Matlin Joey Lucas Guest Star Tim Matheson Vice President John Hoynes Guest Star David Hasselhoff Himself Guest Star Veronica Webb Herself Guest Star Jay Leno Himself Guest Star Jorja Fox Agent Gina Toscano Guest Star Bob Balaban Ted Marcus Guest Star John de Lancie Al Kiefer Guest Star Michael O'Neill Secret Service Agent Ron Butterfield Guest Star NiCole Robinson Margaret Guest Star Bill O'Brien Kenny Thurman Guest Star Peter James Smith Ed Guest Star Aaron Sorkin Executive Producer Thomas Schlamme Executive Producer John Wells Executive Producer Kristin Harms Producer Llewellyn Wells Producer Alan Taylor Director