Eugene O'Neill, American playwright, Nobel Prize laureate (died 1953)

Eugene Gladstone O'Neill was an American playwright. His poetically titled plays were among the first to introduce into the U.S. the drama techniques of realism, earlier associated with Chekhov, Ibsen, and Strindberg. The tragedy Long Day's Journey into Night is often included on lists of the finest U.S. plays in the 20th century, alongside Tennessee Williams's A Streetcar Named Desire and Arthur Miller's Death of a Salesman. He was awarded the 1936 Nobel Prize in Literature. O'Neill is also the only playwright to win four Pulitzer Prizes for Drama.

The Nobel Prize in Literature, here meaning for Literature, is a Swedish literature prize that is awarded annually, since 1901, to an author from any country who has, in the words of the will of Swedish industrialist Alfred Nobel, "in the field of literature, produced the most outstanding work in an idealistic direction". Though individual works are sometimes cited as being particularly noteworthy, the award is based on an author's body of work as a whole. The Swedish Academy decides who, if anyone, will receive the prize.