This is a movie I've seen a long while ago on TCM. What I remember from it is: it was a classic movie, circa 1950s - 1960s it was about two girls, who were friends, and they were in some mansion at some point one of them is murdered, and becomes a ghost, which is sometimes immaterial (can pass through things), but sometimes it can interact with them the girl who's a ghost is invisible except to her friend, who can see her it was a comedy, and...
Originally asked by Shivan Dragon on Stack Exchange (movies) (CC BY-SA 3.0).