Louis Alphonse Gassion (10 May 1881 – 3 March 1944) was best-known as the father of Édith Piaf, the singer who was known as France's national chanteuse and was internationally famous.

[3] On 4 September 1914, he married Annetta Giovanna Maillard, an Italian-born café singer known under the stage name of Line Marsa.

In 1932, when Édith left to live with her boyfriend Louis Dupont and friend Simone Bertaut, he married Jeanne Georgette L'Hôte, with whom he had a third child, Dénise, born in 1931.

He is buried alongside his daughter (Piaf), Théo Sarapo, and granddaughter at Père Lachaise Cemetery.

In 2007, Louis Gassion was portrayed by Jean-Paul Rouve in Olivier Dahan's biopic La Vie en rose.