Check out this article on CNN.com-
"Arnold Schwarzenegger's indiscretions could cost him dearly, now that he's headed for divorce with Maria Shriver.
With the couple splitting, the future of Schwarzenegger's considerable wealth is uncertain, especially since he hasn't said whether he has a prenuptial agreement.
"Did they have a prenuptial? Nobody knows that yet," said J. Michael Kelly, a celebrity divorce lawyer in Los Angeles. Both parties were quite wealthy before they were married: Schwarzenegger as a movie star and Shriver as a television reporter and also a member of the Kennedy clan.
"He married royalty, so the question is would he dare actually propose a prenup to her?" mused Kelly.
Also unclear is exactly how much this Hollywood titan is actually worth, but estimates place his wealth in the hundreds of millions of dollars." Read this article.