François Arsène Cellier (14 December 1849 – 5 January 1914), often called Frank, was an English conductor and composer. He is best known for his tenure as music director and conductor of the D'Oyly Carte Opera Company during the original runs and early revivals of the Savoy operas.
Cellier was born in South Hackney, London to Arsène Cellier, a professor of languages from France, and his wife Mary Ann. He was a chorister at the Chapel Royal, St. James's, where his brother Alfred and Arthur Sullivan had also been choristers. His son was the West End theatre actor Frank Cellier, and his grandson is actor Peter Cellier.
François Cellier succeeded his brother Alfred as the resident conductor of the Gilbert and Sullivan operas at the Opera Comique and then the Savoy Theatre from 1879 to 1902 during their initial runs and revivals (except that Sullivan usually conducted the first night of each) other than from July 1880 to April 1881, after Alfred returned from America. He also served as co-musical director at Richard D'Oyly Carte's Royal English Opera House for the runs of Ivanhoe and La Basoche in 1891–92. He conducted non-Sullivan Savoy Theatre pieces like Alexander Mackenzie's His Majesty and Ivan Caryll's The Lucky Star, and he also sometimes conducted for the company on tour.
In 1902–03, Cellier toured with the D'Oyly Carte Opera Company in South Africa, conducting the Gilbert and Sullivan operas, as well as The Rose of Persia. He left the D'Oyly Carte organisation upon his return to England. Soon afterwards, he conducted his new operetta, Bob (libretto by Cunningham Bridgeman) at the Adelphi Theatre. Bob was also played by D'Oyly Carte touring companies in 1903–04. Cellier conducted a comic opera, Ladyland, at the Avenue Theatre in 1904. In 1905, he returned to the D'Oyly Carte Repertory Opera Company as its musical director until retiring in 1913. He conducted the successful London repertory seasons of Gilbert and Sullivan operas in 1906–07 and 1908–09, respectively.