| Character | Actor |
| Claudia Jean 'C.J.' Cregg | |
| President Josiah 'Jed' Bartlet | |
| Leo McGarry | |
| Josh Lyman | |
| Donna Moss | |
| Toby Ziegler | |
| Charlie Young | |
| Sam Seaborn | |
| Will Bailey | |
| Abbey Bartlet | |
| President Matthew 'Matt' Santos | |
| Deborah Fiderer | |
| Senator Arnold Vinick | |
| Danny Concannon | |
| Mandy Hampton | |
| | Character | Actor |
| Chairman Percy Fitzwallace | |
| Vice President Bob Russell | |
| Helen Santos | |
| Joey Lucas | |
| Zoey Bartlet | |
| Amy Gardner | |
| Bruno Gianelli | |
| Louise Thornton | |
| Ainsley Hayes | |
| Kate Harper | |
| Mallory O'Brien | |
| Nancy McNally | |
| White House Counsel Oliver Babish | |
| Vice President John Hoynes | |
|