Thérèse Dorny (born Thérèse Jeanne Longo-Dorni; 18 September 1891 – 14 March 1976) was a French film and stage actress.

Thérèse Jeanne Longo-Dorni was born on 18 September 1891 in Paris, Île-de-France, France, the only child to Gaudence Jean Baptiste Marie Longo-Dorni (born 1859)[1] and Marie Antonia Longo-Dorni (née Junghanss, born 1865).

[1] She began her career as a stage actress in 1913, and made her debut as a film actress in the 1930 film The Sweetness of Loving.

Dorny married the French painter and graphic artist André Dunoyer de Segonzac on 19 December 1964 in Viroflay, Île-de-France, France,[2] who she remained with until his death in 1974.

Dorny died on 14 March 1976 in Saint-Tropez, Var, France.