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 Mark Harmon Agent Simon Donovan Guest Star Ron Silver Bruno Gianelli Guest Star Evan Rachel Wood Hogan Cregg Guest Star Patrick Breen Kevin Kahn Guest Star Gerry Becker Network News President 1 Guest Star Leon Russom Network News President Guest Star Michael Holden Network News President 4 Guest Star Thomas Kopache Assistant Secretary of State Bob Slatterly Guest Star NiCole Robinson Margaret Guest Star Ned Schmidtke Admiral, Navy Chief of Staff Guest Star Devika Parikh Bonnie Guest Star Kim Webster Ginger Guest Star Ralph Meyering Jr. Tom Guest Star Aaron Sorkin Executive Producer Thomas Schlamme Executive Producer John Wells Executive Producer Paul Redford Producer Michael Hissrich Producer Kristin Harms Producer Llewellyn Wells Producer Christopher Misiano Director Alex Graves Director