Camille Léo Ernest Decreus (sometimes spelt as "Camille DeCreus" or "Camille de Creus") (23 September 1876 – 26 September 1939) was a French composer and pianist.
He married the talented violinist Renée Chemet on 20 May 1906. This year also marked his solo debut. Since then, he was mainly known as a piano accompanist for other musicians in Europe and America, including his wife and the violinist Eugène Ysaÿe.
As a composer, Decreus is today forgotten. Only about ten short vocal pieces with piano accompaniment or piano solo pieces are attributed as Decreus's compositions.[8] No recordings for any of Decreus's work exist, although information about live performance of his work can be found.[9]
A number of composers dedicated works to Decreus, including: