The Constant Nymph is a play based on the 1924 novel of the same name by Margaret Kennedy. The stage version, adapted by Kennedy and the director Basil Dean, was first performed in London in 1926, starring Noël Coward, Edna Best and Cathleen Nesbitt. It portrays the love of two women for a young composer, and the conflicts that arise. The tragic ending has the younger of the two – a teenager – die of heart failure.