Cry of the Werewolf

Cry of the Werewolf, also known as Daughter of the Werewolf, is a 1944 film starring Nina Foch, based on a story by Griffin Jay and directed by Henry Levin.

Plot summary
A Romani princess descended from Marie LaTour has the ability to change into a wolf at will, just like her late mother. When she learns that Marie LaTour's tomb has been discovered, she decides to use her talent to kill everyone who knows the location, because it is a sacred secret that only her people are allowed to know.

Cast

 * Nina Foch as Celeste
 * Stephen Crane as Robert Morris
 * Osa Massen as Elsa Chauvet
 * Blanche Yurka as Bianca
 * Barton MacLane as Lt. Barry Lane
 * Ivan Triesault as Jan Spavero
 * John Abbott as Peter Althius
 * Fred Graff as Pinkie
 * John Tyrrell as Mac
 * Robert Williams as Homer
 * Fritz Leiber as Dr. Charles Morris
 * Milton Parsons as Adamson

Trivia
This is often cited as the first film to have a female werewolf in it, but an early short silent called The Werewolf (the first werewolf film ever made) used that plot device in 1913. The 1913 film is now lost.