Biography
Sidonie Dumas (née Sidonie Rebecca Seydoux Fornier de Clausonne) is a French film and television producer. Born on 28 April 1967 in Boulogne-Billancourt, she has been chief executive of Gaumont since 2004 and its majority shareholder through the family holding company Ciné Par since 2017.
A member of the Seydoux family, she is the daughter of Nicolas Seydoux and cousin of actress Léa Seydoux. She joined Gaumont in 1991 and has produced or executive produced numerous films and series, including The Neon Demon (2016), Lupin (2021), Only God Forgives (2013) and The Wizard of the Kremlin (2026). In 2024 she received the International Emmy Directorate Award.
