The Hilliard Ensemble was a British male vocal quartet originally devoted to the performance of early music. The group was named after the Elizabethan miniaturist painter Nicholas Hilliard. Founded in 1974, the group disbanded in 2014.
Although most of its work focused on music of the Medieval and Renaissance periods, the Hilliard Ensemble also performed contemporary music, working frequently with the Estonian composer Arvo Pärt and included in its concerts works by John Cage, Gavin Bryars, Giya Kancheli, and Heinz Holliger.
The group was founded by Paul Hillier, Errol Girdlestone, Paul Elliott, and David James, although the membership was flexible until Hillier left in the late 1980s. Since 1990 the core members were David James (counter-tenor), Rogers Covey-Crump (tenor/high tenor), John Potter (tenor), and Gordon Jones (bass), with one change: in 1998 John Potter was replaced by Steven Harrold.
The Hilliard Ensemble, under Paul Hillier, had an extensive discography with EMI's Reflexe early music series during the 1980s. The ensemble has since recorded mainly for the ECM label. In 1994, when popular interest in Gregorian chant was at its height, the ensemble released the CD Officium, an unprecedented collaboration with the Norwegian saxophonist Jan Garbarek. The disc became one of ECM's biggest-selling releases, reaching the pop charts in several European countries and receiving five gold discs in sales. Officium's sequel, the 2-CD set Mnemosyne, followed in 1999. The third album, Officium Novum, was released in 2010.