The Masque at Ashby Castle or Entertainment at Ashby was written by John Marston for Henry Hastings, 5th Earl of Huntingdon and Elizabeth Hastings, Countess of Huntingdon performed at Ashby de la Zouch Castle for Alice Spencer, Countess of Derby in August 1607.

John Marston was an English playwright, poet and satirist during the late Elizabethan and early Jacobean periods. His career as a writer lasted only a decade. His work is remembered for its energetic and often obscure style, its contributions to the development of a distinctively Jacobean style in poetry, and its idiosyncratic vocabulary.