Nicolas Coster (born December 3, 1934 in London, United Kingdom) is a British-born American actor, most known for his work in daytime drama and as a character actor on nighttime television series. Coster was born to an American mother and a father from New Zealand.

In daytime, he first appeared in the NBC soap opera Young Doctor Malone. Later, he created the role of Professor Paul Britton on The Secret Storm, a role that he played in 1964 and from 1967-1968. He played John Aldrich in both the primetime serialized drama Our Private World and later on As the World Turns. He also played Robert Delaney on two shows: Somerset and Another World.

Coster's first appearance on television was on an episode of The U.S. Steel Hour in 1959. Since then, he has racked up over 80 appearances on three dozen television shows, guest-starring most notably as David Warner, the father of Blair Warner, on the sitcom The Facts of Life. He also spent one season on the NBC comedy Sheriff Lobo.

He returned to daytime television by first recreating his Robert Delaney role on Another World. He later played gangster-turned-informant Anthony Macana on One Life to Live. He then played a role on a new California-based serial Santa Barbara. He left his role on that show briefly - but long enough to play Steve Andrews on the ABC soap opera All My Children. He returned to act on Santa Barbara but the show was eventually cancelled. He returned to play a second role on As the World Turns.

He is also famous for the television commercials that he has made through the years. One famous line that he said first was on a commercial for Geritol, a vitamin tonic: "My wife: I think I'll keep her."

Coster is currently married, with three children (two from a previous marriage to actress Candace Hilligoss).

Major soap roles:

Mark Steele, Young Dr Malone, (1962-1963)

Paul Britton, The Secret Storm, (1964, 1968-1969)

Robert Delaney, Another World, (1970)

Robert Delaney, Somerset, (1970-1972)

Robert Delaney, Another World, (1972-1976, 1980)

Anthony Makana, One Life To Live, (1983-1984)

Lionel Lockridge, Santa Barbara, (1984-1993)

Robert Delaney, Another World, (1989) [guest-star]

Eduardo Grimaldi, As The World Turns, (1993-1995)

Portrayed the U.S. president in unused footage of the film Contact (1997). This was done to provide a safeguard for the film-makers should something happen to President Bill Clinton (I) before the release of the film.

Learned his craft at the Royal Academy of Dramatic Arts in London.

The son of a film critic.

Studied acting with Lee Strasberg in New York.