This B list mostly movie actress had a chance to save this final sequel installment from the disaster it became, but had to drop out because she was not taking her medications at the time.
The part was then offered to this now A+ list movie actress but she declined because she wanted to do the movie that would make her A+ list.
B list movie actress: Winona Ryder
Movie: The Godfather Part III
A+ list actress: Julia Roberts
Movie made her A+: Pretty Woman
Source: Mr. X via http://www.crazydaysandnights.net