A few beauties who made an impact in Film Noir . . .
Susan Hayward actually played a "nice" girl in the Noir classic "They Won't Believe Me" with Robert Young playing against type as a 3-timing low-life. Susie almost always played "bad" girls in the first half of her career in Hollywood so it's a bit ironic that one of the only noir film roles she ever had was not another one of those.
Lana Turner in a publicity still for Tay Garnett's "The Postman Always Rings Twice". For my money possibly the best picture ever taken of lovely Lana!
Joan Bennet plays an absolutely heartless gold-digging tramp in Fritz Lang's "Scarlet Street", co-starring Edward G Robinson and the eternally oily Dan Duryea. Joan was one of those starlets who's career changed quite a bit simply by her changing her hair color from blonde to brunette!
Gene Tierney . . . *sigh* 
Corrine Calvet only made a small amount of films but her first and best performance in William Dieterle's "Rope of Sand" is well-worth seeing! Burt Lancaster, Paul Henried, Claude Rains and Peter Lorre also starred making it a sort of re-hashing of "Casablanca", though not nearly as good.
No one who's ever seen the "Asphalt Jungle" could forget Marilyn Monroe's appearance in it! To quote the slimy Louis Calhern from the film: "Isnt she a sweet thing!"