Paris Underground, also known as Madame Pimpernel, is a 1945 film directed by Gregory Ratoff, and based on the memoir of the same title by Etta Shiber.

The film stars Constance Bennett and Gracie Fields as an American and an Englishwoman trapped in Paris when Nazi Germany invades in 1940, who rescue British airmen shot down in France and help them escape across the English Channel.

American Kitty de Mornay quarrels with her French husband Andre over her lack of concern over the imminent fall of Paris to the Germans.

After serving them a meal, he reveals that a shot-down English flyer, Flight Lieutenant William Gray, is hiding out there.

Expecting to sneak one man into unoccupied France, they are surprised to find the priest hiding about a dozen in his crypt.

However, he expects the aged Marquise de Montigny to pass away soon; when she does, the undertaker is glad to be able to give the worthy, yet poverty-stricken woman a lavish funeral procession, with the soldiers disguised as mourners.

However, too much is overheard over the phone, and the Germans, led by von Weber, come for them; Andre is there as well, back from England on a mission for the Free French.

When they overhear that von Weber will not stop searching, utterly convinced Kitty is still in the building, she knocks Andre out and gives herself up to save him.

Philip K. Scheuer of the Los Angeles Times wrote that it was unlikely "that the film will cause more than a ripple of interest, although the moviegoer who chances inside should still find it possible to drum up some vicarious excitement over the fate of the two ladies and their rapid turnover of proteges.