| Stockard Channing as | Abbey (Abigail Ann) Bartlet M.D. | First Lady |
| Dulé Hill as | Charlie (Charles) Young | Personal Aide to the President |
| Allison Janney as | C.J. (Claudia Jean) Cregg | Press Secretary |
| Joshua Malina as | Will (William) Bailey | Deputy Communications Director |
| Janel Moloney as | Donna (Donnatella) Moss | Assistant to Deputy Chief of Staff |
| Richard Schiff as | Toby (Tobias Zachary) Ziegler | Communications Director |
| John Spencer as | Leo Thomas McGarry | Chief of Staff |
| Bradley Whitford as | Josh (Joshua) Lyman | Deputy Chief of Staff |
| and Martin Sheen as |
Jed (Josiah Edward) Bartlet | President of the United States |
| Special Guest Stars | ||
| Mary-Louise Parker as | Amy (Amelia) Gardner | FLOTUS' Chief of Staff |
| Jesse Bradford as | Ryan Pierce | Intern |
| William Devane as | Lewis "Lew" Berryhill | Secretary of State |
| Gary Cole as | Robert "Bingo Bob" Russell | Colorado Congressman/ Vice Presidential candidate |
| and Lily Tomlin as |
Debbie (Deborah) Fiderer | President's Secretary |
| Guest Starring | ||
| Elisabeth Moss as | Zoey Patricia Bartlet | Bartlets' youngest daughter |
| Michael O'Neill as | Ron Butterfield | Head of POTUS' Secret Service detail |
| Steven Culp as | Jeff Haffley | Speaker of the House |
| H. Richard Greene as | Robert Royce | Sen. R-Penn |
| Geoff Pierson as | Senator Triplehorn | Senate Minority Leader |
| NiCole Robinson as | Margaret | Hooper (last name) / Assistant to Chief of Staff |
| J. Patrick McCormack as | General Jimmy Wendall | |
| Charlotte Colavin as | Sheila Fields | Member of Dem. Leadership |
| H.M. Wynant as | Senator Starkey | |
| Robert Arce as | August Adair | Senator |
| Co-Starring | ||
| Melissa Fitzgerald as | Carol | Fitzpatrick (last name) Assistant to the Press Secretary |
| Timothy Davis-Reed as | Mark | O'Donnell (last name) / Reporter |
| Kris Murphy as | Katie | Witt (last name) / Reporter |
| Margaret Bacon as | Young Zoey | |
| Donald Sage Mackay as | Ellis | Fourth of July Oval Office meeting |
| Tom W. Chick as | Gordon | Reporter |
| Marc Antonio Pritchett as | Reporter #2 | |
| Rebecca Avery as | Reporter #3 | Anna |
| Hugh Dane as | Judge |
"So you have to cast William Devane as Speaker of the House," I begged him. Sorkin lit up at the idea. "With the connection he already has with Martin (they played the Kennedy brothers in the old miniseries 'Missiles of October'), they'd have fabulous chemistry," said Sorkin, who promised to give all the credit to moi if Devane ends up on the show.
"Press tour ends with NBC stars under the stars"
by Elaine Liner
August 5, 1999
Corpus Christi Caller Times
"What you will see is the new speaker, the majority leadership (Republican) and their views much more represented on the show," Wells told reporters in a conference call last week. "Our characters aren't changing, but the world in which they live forces them to hear the other points of view."
"Big changes in store for 'West Wing'; 'Frasier' to finish up quietly"
by Mike McDaniel
September 23, 2003
Houston Chronicle
Adding to the realism, the new vice president, played by Gary Cole, will be in place by episode four or five, and around more than predecessor Tim Matheson."He needs to be brought up to speed," Wells says of the character. "He's also very ambitious."
"'West Wing's' fifth season: Politics NOT as usual "
by Jill Vejnoska
September 24, 2003
Atlanta Journal-Constitution
Margaret Bacon, 10, of Berryville got to be the "first daughter" of a future U.S. president for several days in September....
Margaret was filmed in September for a cameo role as the president's daughter in the NBC series "The West Wing" on Wednesday nights.
...
"At the end I say, 'It wasn't scary Daddy, it was fun.'" said Margaret, who really enjoyed working with Sheen.
"I spent some time with Martin Sheen, just talking with him, and we had to work some things out when we were actually acting," she said. "He's funny and really nice. And he was easy to get along with while acting."
Margaret got the role when a family friend and actor discovered the West Wing producers were looking for a young girl and one who could ride.
Margaret has a lot of experience riding horses.
...
A film crew came out to Clarke County for the auditions in September to film her riding a horse.
Although she was confident on a horse during the auditions, the part called for a 5-year-old, and Margaret felt intimidated knowing she was up against younger competitors.
"I had to audition against actual 5 year olds," she said.
After she got the part, however, Margaret and her family were impressed with how professionally the entire shooting process was run.
The actual filming of the scene took place in Marshall.
"I had my own dressing room, and they escorted me around everywhere," Margaret said.
Her mother, Rives Bacon, said the director and production team worked hard to film a believable segment.
"Having never seen a TV show being made," Bacon said, "I was surprised there is so much money being spent, so many people out there doing every episode.
"They were really professional and really nice to us."
The exact details put into every shot also impressed Bacon.
"They didn't just shoot it and say 'that's fine,'" Bacon said. "They spent hours getting every shot just perfect.
"To spend all that time shooting for such a little scene is impressive," Bacon said.
She also got to go over the fence into the paddock once to help them get it right.
"I only went across the fence to make a suggestion once, when it didn't look like she was falling off," Bacon said. "They were ready to say it was a good shot, but for us, it looked like she was just ducking as if to go under a low branch."
Her sister Mary, age 11, said she got to watch while Margaret practiced, but had to stay in school for the actual filming.
"I thought it was really neat," Mary said. "They let me try out for it too, but I didn't think I would really get it."
Their mother took them to Marshall so Margaret could practice the night before and to get comfortable with the horse. The next day, Margaret went back to film.Much of the practice and filming involved Margaret lurching forward on the horse's neck like she was falling off, and Sheen catching her.
The horse, fittingly named Diablo, "wasn't that easy to ride," she said. "I pulled on the reins one time and he reared up.
"The handler told me not to pull the right rein, because he was a fall horse also. He was trained to fall down like he had been shot."
"A Turn as the President's Daughter"
by Karl B. Hille
November 18, 2003
Winchester Star
"Things were not easy in the White House at the beginning of this season. I mean, fictionally," he [John Spencer] said. "And a lot of it fell on Leo's head, an unhappy staff, a president that was miserable and had lost his daughter, and a first lady who could no longer communicate with me and said that she didn't want me in the house any longer. So Leo's been going through a lot of stuff."
"It's good to have irascible Leo back"
by Ellen Gray
February 11, 2004
Philadelphia Daily News