Martin Sheen turns 80: a look back (19 images)

Geena Davis (L), who was nominated for Outstanding Performance by a Female Actor in a Drama Series for her work in "Commander in Chief," and Sheen arrive for the Screen Actors Guild Awards in Los Angeles on January 29, 2006. Later that year, "The West Wing" led the Emmy Award nominations. Photo by Jim Ruymen/UPI

Mike Farrell (L), Martin Sheen (2nd-L) and Maria Bello (4th-L) join anti-war demonstrators including Fernando Suarez Del Solar (3rd-L) in a protest march on the third anniversary of the U.S.-lead invasion of Iraq in Los Angeles on March 18, 2006. After "The West Wing" ended its run, Sheen attended a college in Ireland. Photo by Jim Ruymen/UPI

Cast members Don Cheadle (L) and Sheen arrive at the screening of "Talk to Me," as part of the opening night celebration of the 2007 Los Angeles Film Festival in Los Angeles on June 21, 2007. Photo by Jim Ruymen/UPI

Sheen (L) and "The West Wing" co-star Stockard Channing greet one another at the Stella Adler Studio Benefit Gala honoring Martin Sheen, Liz Smith and Roy Scheider in New York City on March 17, 2008. Photo by Laura Cavanaugh/UPI