Sources close to the couple tell us both Kim and her NBA star hubby-to-be are telling friends:

“It’s the smart thing to do.”

And, by the way, they’re right.

We’re told the move isn’t one-sided. Both Kim and Kris have tons of loot. Kim is worth a reported $35 million. As for Kris he’s not only making $3.2 mil a year with the Nets, his family also owns a couple of burger joints in Minnesota. Kris’ net worth is estimated at $8 million.

In addition to the influence of a pre-nuptual agreement, Kim’s late father, famed O.J. Simpson attorney Robert Kardashian, told her about the importance of contracts and Kim feels her dad would have wanted her to take financial precautions.