(b London, 1 Dec. 1844; d London, 28 Dec. 1891). English organist, conductor, and composer. After an early career in church music, and a brief period as director of the Belfast Philharmonic Society, he turned his attention to the theatre as both composer and conductor. Appointments in Manchester (Prince's Theatre, 1871–5) and London (the Opera Comique, Criterion, and St James's) culminated in a long association with the Savoy Theatre and Richard D'Oyly Carte, not least as his representative in the USA and Australia. Cellier was closely linked with Sullivan: he conducted many of the Savoy operas, including HMS Pinafore and Iolanthe (in the USA), composed the overture for The Sorcerer, and helped the composer with the score of The Pirates of Penzance, as well as presiding over the first performance of Ivanhoe (1891).
From The Oxford Companion to Music in Oxford Reference.