Thomas the Impostor (French: Thomas l'imposteur) is a 1965 French drama film directed by Georges Franju and starring Emmanuelle Riva, Fabrice Rouleau, Sophie Dares, Jean Marais and Charles Aznavour.

The film is set during World War I, as Paris is expected to fall to the Germans.

The Princesse de Bormes, a widow, helps wounded soldiers by evacuating them from the front and bringing them to her villa in Paris for medical care.

Thomas is able to use his position of posing as the general's nephew to cut through the red tape, in order to help the Princess.

"[2] The review concluded that "Franju has captured the spirit of Cocteau's novel, the point at which the surface glamour of war becomes the awful reality of its suffering.