Was Toni Collette actually offered Roxy? Or did she just audition?
Speaking of CHICAGO, the choice for Mary Sunshine came down to Christine Baranski and Kristin Chenoweth (who I beieve also auditioned for Roxy, but they were gonna cast that role with a star)...obviously Baranski got the part.
Nicole Kidman also got offered Roxy but turned it down to do MOULIN ROUGE. Both Catherine Z. Jones and Renee Zellweger auditioned for that movie, but Kidman got the part. Interestingly enough, Zellweger was pretty crushed when she put herself through the audition process (which obviously included singing and dancing) for that movie and didn't get the part, this almost kept her from meeting with Rob Marshall about CHICAGO. On the other hand, Jones was allegedly given the choice to play either Velma or Roxy.
Charlize Theron was attached to play Roxy when Nicholas Hytner was attached to direct the film, when he dropped out, Marshall had her audition for him but chose to go with Zellweger instead.
Meryl Streep got offered SWEENEY TODD but turned it down, at the time she claimed "scheduling conflicts," but there were rumors back then that she had already been approached by Rita Wilson and Tom Hanks about MAMMA MIA and so she had a different movie musical to do in time.
Streep was also cast as the title role in EVITA when Oliver Stone was set to direct the film, but that project never took off.
Donna Murphy and Catherine Z. Jones both turned down the chance to appear in the ANYTHING GOES revival directed by Kathleen Marshall, Murphy didn't want to be in a revival and Jones felt the role wasn't right for her to make her Broadway debut at the time.
"Some people can thrive and bloom living life in a living room, that's perfect for some people of one hundred and five. But I at least gotta try, when I think of all the sights that I gotta see, all the places I gotta play, all the things that I gotta be at"