Lemarquis was born in Reykjavík, the son of an Icelandic mother and a French father, Gérard Lemarquis, who is a schoolteacher.[1] His most distinguishing physical feature—a complete lack of hair of any kind—is the result of alopecia universalis, which made him completely hairless by the age of 14.[2] He grew up in Iceland, and studied theater at the Cours Florent in Paris, where he was a classmate of actress Audrey Tautou.[2] He also attended the Reykjavík School of Fine Arts in Iceland, graduating in 2004.[2]