It seems unlikely this was part of the advice a priest recently gave her, but Nicole Kidman has asked fiance Keith Urban to sign a prenuptial agreement.

The pact guarantees the country crooner just over $600,000 a year for every year the couple is together, the New York Post reports. There's also a clause that excuses Kidman from giving a cent if Urban, an ex-coke addict, uses illegal narcotics or boozes excessively. Amen to that, sister!

The agreement, signed in Los Angeles earlier this month, also calls for joint custody of any kids the couple has together.

In Kurban wedding news: Kidman is expected to wear a long white gown with a Victorian-style high collar during the Catholic ceremony, expected to be held at an old Gothic chapel overlooking the sea in the Sydney suburb of Manly.

Among the 200 guests expected are:

• Meryl Streep
• Julianne Moore
• Russell Crowe
• Naomi Watts
• Hugh Jackman

The Gossip is still awaiting its invitation.