Here is an interesting tidbit that I discovered while trying to find out how tall Montgomery Clift was. I am sure most people knew that he turned down the role in SUNSET BLVD, but I found this quote at one website:
"Monty famously rejected the role eventually played by William Holden in Sunset Boulevard. He rejected many other parts including Bus Stop (the Don Murray role), Moby Dick (Gregory Peck), Trapeze (Tony Curtis), Shane (Alan Ladd), A Star is Born (James Mason), On the Waterfront (Marlon Brando), Mrs Miniver (Richard Ney), Rio Bravo (Dean Martin) and East of Eden (James Dean)."