I'm not sure who was in the running for the two main parts. I can imagine the stage actors were definitely considered, whether they screen tested or not.
The biggest "drama" during the casting of this film was for Constanze, Mozart's wife. Meg Tily had the part initially, and then had to drop out suddenly before filming. I can't remember why, but she was either very sick or broke her foot, or something like that.
So, they had TWO other actresses heavily in the running. Elizabeth Berridge who played the part, and another "well known" actress. They don't say her name on the DVD though. The horrible part was that Milos Forman couldn't make up his mind between the two, so he started filming with BOTH of them. They actually were both on the set together, and filmed several scenes (for I believe almost a week!) next to each other. They would shoot everything twice. It wasn't until after a few days that he made his choice. Berridge talks about how uncomfortable and nerve-wracking that was.
I can only imagine.
"Jaws is the Citizen Kane of movies."
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