"I Went to a Marvellous Party" (sometimes known as "I've Been to a Marvellous Party") is a song with words and music by Noël Coward, written in 1938 and included in his Broadway revue, Set to Music, in which it was performed by Beatrice Lillie in January 1939. Lillie introduced the song to London audiences in June of that year in cabaret at the Café de Paris. It was later included in the revues All Clear (1939), Cowardy Custard (1972) and Oh, Coward! (1972). Both Lillie and Coward made recordings of the song, which is among his most popular.