Guillaume Tranchant (born 20 February 1980), better known by his stage name Gringe, is a French rapper, songwriter and actor. He is one half of the French hip hop duo Casseurs Flowters, along with Orelsan, with whom he has released two studio albums: Orelsan et Gringe sont les Casseurs Flowters in 2013, and the original soundtrack for their 2015 film Comment c'est loin.

In 2004, Gringe formed the hip hop duo Casseurs Flowters with his colleague Orelsan, and with help from French record producer Skread, they released their first mixtape Fantasy: Episode 1 in 2004 with 11 tracks. Afterwards, the two decided to focus on building their solo careers; Gringe collaborated with a number of artists including El Matador, Brasco, Pit Baccardi, La Province, Jamal and Nubi, while he also appeared on the song "Ils sont cools", from Orelsan's second studio album Le chant des sirènes, which peaked at number 66 on the French (SNEP) Singles Chart.