Céline Sciamma served as costume designer as well as writer and director for the film, as she did for Bande de filles (2014).
Nelly and Marion take a dingy boat trip to visit the 'Pyramide de l'Ax Majeur' , a famous public art attraction located in Cergy, France.
Actresses Joséphine Sanz (playing Nelly) and Gabrielle Sanz (playing Marion) are identical twins in real life.
The title translates to "Little Mom" in American English.