The Hilliard Ensemble is a British vocal group known for their performances of medieval and Renaissance music. Formed in 1974, the group has been a major force in the revival of interest in medieval music throughout the world. Their performances often feature intricate harmonies and complex musical arrangements, which showcase the group's technical skill and musicality.

The group's repertoire includes a wide range of musical compositions, from the works of Guillaume Dufay to those of the Hilliard's namesake, John Hilliard. Their performances have been praised for their emotional intensity and musicality, and have featured in numerous recordings and live performances. The Hilliard Ensemble has collaborated with other musicians and ensembles, including the medieval ensemble The Tallis Scholars and the conductor Paul Hillier. Their music is characterized by its rich harmonies, complex rhythms, and sense of historical authenticity.