Actually, let's stick with the '64 Academy Awards, because I like the intrigue here. The leading lady of said Best Picture winner had been cast over Julie Andrews (who had originated the role on Broadway but wasn't considered a big enough name). Imagine her surprise when she wasn't even nominated, and the Best Actress award went to Andrews for WHAT OTHER MOVIE MUSICAL, later adapted for the stage and now anticipating a 2018 film sequel?
MARY POPPINS