THE JONAS BROTHERS SAY'S WE WANT PRE-NUP!

A Jonas brother is going to the chapel—but not with out a pre-nup.
Much to the dismay of teen girls everywhere, Kevin Jonas, 21, the oldest of the pop star trio, the Jonas Brothers, is still set to marry his longtime sweetheart, Danielle Deleasa—after she signs an iron-clad pre-nup, reports In Touch Weekly.

The boy band member has no doubt that it's the real thing, say insiders, but that doesn't mean he's in any rush.

"Kevin sees Danielle as his soulmate, and he's very Christian, so he's not big on divorce. Nonetheless, he has millions to protect," a source said.

Possible terms for the legal document have not yet been confirmed and both sides are staying so tight-lipped, they won't even confirm that a pre-nup is under discussion.

Jonas proposed to Deleasa on July 1 at her home, after catching a red-eye flight from a concert in Canada. The singer, known for hits like "Mandy" and "Burning Up," proposed with a cushion cut diamond ring he had personally designed with the help of jewelry designer Jacob & Co.

The native Jersey girl and Jonas met while their families were on vacation in the Bahamas in May 2007.

Since then, there has been plenty of speculation about when and where the wedding will take place, with most sources saying it's bound to happen either this winter or spring 2010 in the Bahamas.

Jonas has already announced that both of his younger brothers, Joe and Nick, will serve as his groomsmen.

But don't expect any wild bachelor parties.

The notoriously clean cut trio has said the bachelor party for Kevin will be low-key, and among friends and family.

"It will be good, clean fun. We're going to have a good time with friends and family," Nick Jonas, 17, told People.com.

Added 20-year-old Joe Jonas, "It won't be in Vegas. Vegas is not really the ideal place. We are thinking somewhere even cooler and better."