Katie Holmes Won't Profit From Tom Cruise Divorce

We've learned the prenup Katie signed is long, tight and stacked in Tom's favor. We're told reports that she'll walk away with $15-20 million are absurd. Our sources say Katie will walk away with what she brought into the marriage ... and hardly anything else.

Our Katie sources tell us, "She's not about the money. She's not that girl. She loves to work."

We're told there's one thing Katie is insistent on -- she wants child support from Tom, and that could turn into a big ticket item.

As for whether Katie will challenge the prenup ... it's pretty common when a divorcing couple is in conflict, and our Katie sources are not ruling that out. But they insist, "Money is not that important to her. She makes plenty on her own."