Duchess of Idaho (1950)

Ellen Hallit is in love with her playboy boss, Douglas Morrison, but is too timid to do anything about it. To help her, her roommate Chris decides to step in, and devises a plan. Chris follows Morrison on his trip to Sun Valley, Idaho and plays the overattentive female, hoping that he will send for Ellen (who often played his "fiancée" when he had a female he couldn't discourage otherwise.) Complications arise when Chris catches the eye of band leader Dick Layne, and finds herself caught in a triangle between the two men.