For a second I thought that Kathryn Grayson was Dorothy Dandridge. lol.
I'm watching Show Boat (first time and enjoying it) and at first glance without clicking on the 'Guide' button I thought the actress was Dorothy Dandrige. Kathryn was very beautiful in this movie. Not to offend but she could pass for a bi-racial or a light skinned black woman if she had wanted to back in the day.
Scarlett: Sir, you are no gentleman.
Rhett Butler: And you, Miss, are no lady.