[16][17] Her paternal grandmother, Suzanne Achache–Wiznitzer, was an Austrian-Jewish psychoanalyst[18] who survived the Holocaust[19] as a child while hidden in the Château de Chambord in France during World War II.

[1] She became a mother at the age of 20 and directed a documentary film about childbirth,[23] Alma et les autres, released in 2004,[24] which became a reference in more than 500 maternity wards in France during birth preparation sessions.

[25][26] In 2005, she wrote and directed the short film Suzanne, based on the story of her grandmother, who witnessed her father being arrested by the nazis when she was 13 years old.

[1] In 2021, she wrote and directed her third feature film, the World War II drama Valiant Hearts, starring Camille Cottin,[28] based on the real-life story of her grandmother, Suzanne Achache–Wiznitzer, who was a Jewish child placed in foster care to escape the Holocaust.

[21][29] That same year, she also directed the Netflix documentary The Women and the Murderer, about French serial killer Guy Georges.

She later revealed that their relationship ended after he confessed to her that he had fallen in love with and inappropriately touched actress Adèle Haenel, who was at that time underage.