Lacoste was born in Paris in 1974. After a few years working as photographer and composer for a theatre company, he went to the animation school of the National center of the comic strip in Angoulême, France to learn Softimage. He did there his first short movie “Nîumb” which was screened at Siggaph, Imagina and anima-mundi 2000. As of 2009, Lacoste returned to the video game industry, working as a Senior Art Director for EA, and again at Ubisoft Montreal on the Assassin's Creed series; to this end, he became the Art Director for Assassin's Creed: Revelations.