Gwennyn, born Gwennyn Louarn on June 27, 1974 in Rennes, is a singer-songwriter in Breton, French and English. She develops rhythmic compositions, both of traditional and modern inspiration.

In Brittany, she played in the biggest festivals: Les Vieilles Charrues, Les Tombées de la nuit, Le Cornouaille, L'Interceltique de Lorient, Kann al Loar, Chant de Marins de Paimpol, Saint-Loup, Mouezh ar Gelted, Îlophone à Ouessant... She regularly performs abroad (Germany, Spain, Portugal, etc.). She has become one of the ambassadors of contemporary Breton song and Celtic pop-rock music.