Ramón Antonio Gerardo Estévez (born August 3, 1940), better known by his stage name Martin Sheen, is an American film actor best known for his performances in the films Badlands (1973), Apocalypse Now (1979), Wall Street (1987), The Departed (2006), his role as The Illusive Man in the Mass Effect trilogy and President Josiah Bartlet in the television series The West Wing.

He is considered one of the best actors never to be nominated for an Academy Award despite his acclaimed performances.^[opinion] In film he has won the Best Actor award at the San Sebastián International Film Festival for his performance as Kit Carruthers in Badlands. His portrayal of Capt. Willard in Apocalypse Now earned a nomination for the BAFTA Award for Best Actor. Sheen has worked with a wide variety of film directors, such as Richard Attenborough, Francis Ford Coppola, Terrence Malick, David Cronenberg, Mike Nichols, Martin Scorsese, Steven Spielberg and Oliver Stone. He has had a star on the Hollywood Walk of Fame since 1989. In television he has won both a Golden Globe and two Screen Actors Guild awards for playing the lead role of President Bartlet in The West Wing, and an Emmy for guest acting in the sitcom Murphy Brown.