[2] Her twin sister is set designer Esther Mysius, with whom she often collaborates on film projects.

[8] Her 2014 short film Thunderbirds (French: Les oiseaux-tonnerre), which Mysius directed and for which she wrote the screenplay, was also a success at festivals.

[11] In 2017, Mysius co-wrote the screenplay for Arnaud Desplechin's Ismael's Ghosts, which premiered at the opening of the 2017 Cannes Film Festival.

[13] The films follows a 13-year-old girl named Ava (Noée Abita) who spends a summer by the sea shortly before she goes completely blind due to retinitis pigmentosa.

[24] Stars at Noon also had its world premiere at the 2022 Cannes Film Festival, where it was selected to compete for the Palme d'Or.

[25] In 2024, she had collaboration credits on the screenplays of two films: Claire Burger's coming-of-age drama Langue étrangère and Jacques Audiard's musical Emilia Pérez.