Louis Warynski (born 6 January 1984),[1] better known by his stage name Chapelier Fou (Mad Hatter) is a French electronic musician from Metz.

Since 2008, he has released five EPs and nine studio albums, all through the independent record label Ici, d'ailleurs... Louis Warynski was born on 6 January 1984, in the French city of Metz.

[4] He began working with electronic music, sampled lines by Lewis Carroll's Mad Hatter, and adopted the moniker as his stage name.

In 2010, the artist appeared at Les Francofolies de La Rochelle and later travelled to Hungary to perform at Sziget Festival, in Budapest.

[10] Chapelier Fou has since published the EPs Protest (2014) and Fuses (2015) as well as the full-length albums Deltas (2014), Kalia (2016), Muance (2017), !