The West Wing

Stockard Channing is an American actress known first for her role as Betty Rizzo in the 1978 musical film Grease, and later as First Lady Abbey Bartlet in the television drama The West Wing, appearing in 62 episodes from 1999-2006

Allison Janney is an American actress best known for her role as White House Press Secretary (and later Chief of Staff) C.J. Cregg in the television drama series The West Wing, from 1999-2006.

Dulé Hill is an American actor best known for his starring television roles as presidential aide Charlie Hill in The West Wing (1999-2006) and as Gus on Psych, from 2006-2014

Janel Moloney is an American actress best known for her role as Donna Moss on the television drama series The West Wing

Bradley Whitford is an American actor best known for his role as Deputy Chief of Staff Josh Lyman on the television drama The West Wing, from 1999-2006

John Spencer (December 20, 1946 – December 16, 2005) was an American actor best known for his role as Leo McGarry, the White House Chief of Staff, on the television drama series The West Wing, from 1999-2006

Moira Kelly is an American actress best known for her roles as Mandy Hampton on the first season of The West Wing; and as Karen Roe in One Tree Hill

Martin Sheen is an American actor best known for his role as Captain Willard in the film Apocalypse Now (1979) and as President Josiah Bartlet on the television drama series The West Wing, from 1999-2006

Rob Lowe is an American actor who came to fame after appearing in a string of popular 1980s movies that included other members of the Brat Pack, especially St. Elmo's Fire. Lowe is also known for his role as Sam Seaborn on The West Wing, from 1999-2006.

Richard Schiff is an American actor and director best known for his role as Toby Ziegler on the television drama series The West Wing (1999-2006), for which received an Emmy Award.

Joshua Malina is an American actor best known for his television roles as Jeremy Goodwin on Sports Night (1998-2000) and as Will Bailey on The West Wing, from 2002-2006

Mary McCormack is an American actress best known for her television roles as Justine Appleton on Murder One (1995-1997), as Kate Harper on The West Wing (2004-2006) and as Mary Shannon on In Plain Sight, from 2008-2012

Kristin Chenoweth is an American singer, musical theatre performer, actress and author

Jimmy Smits is an American actor best known for his long-running roles on the television series L.A. Law, as Richard Dysart's youngest uptight law partner, Victor Sifuentes (1986-1991); as Dennis Franz's second partner, Det. Bobby Simone, in NYPD Blue (1994-1998); as well as his role on The West Wing as congressman and presidential candidate Matt Santos.

Alan Alda is an American actor, writer and director best known for his role as Hawkeye Pierce in the television series M*A*S*H, from 1972-1983