Lluís Millet i Pagès (El Masnou, 18 April 1867 - Barcelona, 7 December 1941) was a Spanish Catalan composer, musician and co-founder of Orfeó Català in 1891.
A student of Felip Pedrell, from 1896 he taught choral music at Barcelona's Escuela Municipal de Musica where he later succeeded Nicolau as director.
Lluís Millet's family moved to Barcelona to escape the threats posed by the Third Carlist War. The family wanted Lluís to become a merchant, but he followed the musical career by enrolling at the Conservatory of the Liceu of Barcelona. There he trained under Miquel Font and Josep Rodoreda, and Carles G. Vidiella.
Lluís Millet was early attracted to choir songs, and aged just 17 he became conductor of the Chorus the "La Lira de Sant Cugat del Vallès." He also had a job at the Cafè Inglés in Barcelona, first as pianist and later as a member of a trio with Josep Badia, the violinist, and Lluís Pamies, who played the harmonium.