Did Arnold Schwarzenegger & Maria Shriver Have a Prenup?

ET sits down with family attorney Robert Brandt to sort out the possibilities of a divorce between Arnold Schwarzenegger and Maria Shriver and explore whether the pair signed a prenuptial agreement before their storybook wedding in 1986.

"It could be massive if there is a divorce," Brandt said. "We are talking about a world famous actor who was making $20 million a movie before he became governor. We are talking about someone who is in the Kennedy family -- one of the most famous, wealthy families in the world. A case like this, if they don't work it out, could involve tremendous sums of money. We could be talking about upwards of a billion dollars in net worth."

"Under California law, all community property has to be equally divided. So if we are talking about a billion dollars in acquisitions -- from the date of marriage to the date of separation -- each one of them is going to end up with half a billion dollars, absolutely," Brandt said.

The attorney at the Feinberg, Mindel, Brandt & Klein law firm in Los Angeles said that while it has not been disclosed whether the famous couple signed a prenuptial agreement, he's sure they evaluated this carefully before the marriage. "I would have to think that considering she was from the Kennedy clan, and he had already done many, many movies and was extremely successful -- and he was an actor -- they certainly had to have thought about a prenuptial agreement."