Szumowska worked also as a co-producer of Antichrist, Lars von Trier’s horror film released in 2009. In 2011, she completed her international project, Elles, starring Juliette Binoche. The worldwide première of Elles took place at Toronto International Film Festival. It tells the story of Anne, a Parisian Journalist investigating prostitution among the students. Her research takes her to two girls, Charlotte and Alice, whose lives differ greatly from her own. They let her discover a world which she finds both repulsive and seductive.