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 Mary-Louise Parker Amy Gardner Guest Star Devika Parikh Bonnie Guest Star Kim Webster Ginger Guest Star Benjamin Brown Mike Wayne Guest Star Elisabeth Moss Zoey Bartlet Guest Star Trent Ford Jean Paul Guest Star Joshua Malina Will Bailey Guest Star Mary McCormack Actor Aaron Sorkin Executive Producer Thomas Schlamme Executive Producer John Wells Executive Producer Neal Ahern Jr. Producer Paul Redford Producer Kristin Harms Producer Llewellyn Wells Producer Debora Cahn Writer Alex Graves Director