The Cocktail Party is a verse drama in three acts by T. S. Eliot written in 1948 and performed in 1949 at the Edinburgh Festival. It was published in 1950. The play was the most popular of Eliot's seven plays in his lifetime, although his 1935 play, Murder in the Cathedral, is better remembered today. It focuses on a troubled married couple who, through the intervention of a mysterious stranger, settle their problems and move on with their lives.

Thomas Stearns Eliot was a poet, essayist, publisher, playwright, literary critic and editor. He is considered to be one of the 20th century's greatest poets, as well as a central figure in English-language Modernist poetry. His use of language, writing style, and verse structure reinvigorated English poetry. He is also noted for his critical essays, which often reevaluated long-held cultural beliefs.