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 Emily Procter Ainsley Hayes Actor Laura Dern US Poet Laureate Tabatha Fortis Guest Star NiCole Robinson Margaret Guest Star Renee Estevez Nancy Guest Star Yolanda Lloyd Delgado Terri Guest Star Beth Littleford Leslie Guest Star James Eckhouse Representative Bud Wachtell Guest Star Devika Parikh Bonnie Guest Star Kim Webster Ginger Guest Star Kris Murphy Katie Witt Guest Star Aaron Sorkin Executive Producer, Writer Thomas Schlamme Executive Producer John Wells Executive Producer Paul Redford Producer Michael Hissrich Producer Kristin Harms Producer Llewellyn Wells Producer Christopher Misiano Director