Yoann Haouzi (born January 1, 1990), known professionally as Kemmler or Kem is a French rapper, composer and music-producer.

Yoann Haouzi (Kemmler) was born in Marseille and made his first steps in the musical world at the age of 14.

[1] There he created a duo "Renega" with his friend Verbal, which quickly lead them to success on stage and rap competitions in Marseille.

His collaborations include Amir Haddad, Nazim Khaled, Stav Beger, Mosimann, Youssoupha, Banx & Ranx, Elyot Milshtein, Nae and others.

[3] A single "Sommet", that he co-wrote with Amir and Nazim was selected to be an official theme of the 2024 Summer Olympics on French TV.