Does anyone know websites where I can find out what actors were ped over as casting choices for movies?

Well sometimes on imdb.com if you read peoples profiles it tells you what parts they tried out for and if they got it or if someone else got it over them. I think on Jake Gyllenhaals it says he tried out for the part of Batman or something, but didn't make it. And Cillian Murphys also says stuff liket hat. I'm pretty sure it tells for most actors.