"[5] Before filmmaking, Diwan was a junior editor at Denoël as well as publishing various novels.
Her 2021 film Happening was selected for the main competition at the 78th Venice International Film Festival, where it was subsequently awarded the Golden Lion, thus making her the sixth female director to ever win this award.
[4] Diwan was in a relationship with French director Cédric Jimenez, with whom she had two children, born in 2007 and 2008, respectively.
[7] On 29 September 2023, Diwan announced her engagement to film producer Thibault Gast,[8] with whom she has been in a relationship since 2021.
[7] She is a member of Collectif 50/50, a French NGO promoting equality between men and women in the film industry.