Born in Liège (Belgium), Gaëlle Gillis studied Dramatical Arts at the Royal Conservatory of Mons. She obtained her first leading role in 2015, in the cult movie '46, XX', directed by Guido de Craene. For that performance, Gaëlle was nominated as 'Best actress' at the Ohio Indie Film Festival, and won the 'Best actress in debut performance' award at the New York Independent Film Festival. In 2017, she played Nina in the movie 'The Shadow Within', directed by Tiago Mesquita.