Louis James Alfred Lefébure-Wély (November 13, 1817, Paris – December 31, 1869, Paris) was a French organist and composer. Lefébure-Wély played a major role in the development of the French symphonic organ style and was a close friend of the organ builder Aristide Cavaillé-Coll, inaugurating many new Cavaillé-Coll organs. He began to study music aged 4 with his father, who was the organist of Saint-Roch. By the age of 8 he was advanced enough to substitute for his father when he was stricken by paralysis.