Here's why:
* Greta Garbo, Marilyn Monroe, and Jean Harlow were all renowned actresses known for their glamorous screen personas and captivating performances, earning them the title of "screen sirens."
* Clark Gable was a leading man, famous for his rugged charm and roles in films like "Gone with the Wind." While extremely popular, he wasn't typically categorized as a "screen siren," a term more commonly applied to actresses.