Conversation so far:
When did the film Shakespeare in Love begin production?
Shakespeare in Love went into production in 1991.
Where was Shakespeare in Love filmed?
Among the locations used in the production were Hatfield House, Hertfordshire, Broughton Castle, Oxfordshire, the beach at Holkham in Norfolk, and the Great Hall of Middle Temple, London.
Who were the actors in Shakespeare in Love?
Harvey Weinstein persuaded Ben Affleck to take a small role as Ned Alleyn.
Who else was in Shakespeare in Love, besides Ben Affleck?
Julia Roberts agreed to play Viola.
Did Julia Roberts actually star in the film Shakespeare in Love?
Julia Roberts withdrew from the Shakespeare in Love, six weeks before shooting was due to begin.

Question: Why did she withdraw?
Self-contained rewrite: Why did Julia Roberts withdraw from Shakespeare in Love?