John Kerry, who is worth more than $500 million, is the first presidential candidate to sign a prenuptial. Wife Teresa Heinz's motto: "You have to have one."

Donald Trump says that if he were president he'd "have to get a prenup, to save the country." He's now engaged to Melania Knauss.

Because Amy Irving and Steven Spielberg signed a prenup without attorneys, it was thrown out in court. She got half of his earnings during their four-year marriage -- 100 million.

Actress Halle Berry is fighting to uphold her agreement, as ex Eric Benet battles for spousal support.

In her prenup with corporate titan Jack Welch, former attorney Jane Beasley Welch added a sunset clause that nullified the agreement after 10 years of marriage. When they divorced after 13 years in 2003, she was thus entitled to more than $150 million.

Britney Spears signed a prenuptial at her mother's request before she wed dancer Kevin Federline this September.