Adapted from a novel by Joyce Carol Oates, named "Lives of the Twins".
When Chloé's mom is talking to the doctor, she's wearing the golden cat head pendant that Louis gave Chloé for her birthday.
François Ozon had the project in mind since 2013, but at the time he didn't think of casting Marine Vacth, who he'd just directed in Young & Beautiful (2013), as she was too young. By the time filming actually started some three years later, Vacth had become a mother and matured, leading Ozon to see her in a new light.
When Chloé is leaving the museum, she crosses under a site specific artwork from Brazilian artist Henrique Oliveira. The artwork "Baitogogo" was created exclusively for this exhibition at the Palais de Tokyo using the building's original structure and was in the museum's building from 30/11/2013 to 18/12/2016. The museum where Chloé works is actually the famous Palais de Tokyo.
The film was selected to compete for the Palme d'Or in the main competition section at the 2017 Cannes Film Festival. It premiered on 26 May 2017 at Cannes.