This rumor has been circulating for weeks, but now it's apparently a done deal: Lauren Conrad's former high school rival on Laguna Beach, Kristin Cavallari, will be stepping in for her retiring counterpart on The Hills, beginning in the season finale and continue next fall.

Kristin, who introduced Heidi Montag and Spencer Pratt four years ago, will make her Hills debut May 31 at the plastic pair's wedding - and she'll catch the bouquet, natch.

Moreover, she admits she's doing this to bolster her own fame, and that part of the reason she was brought on board was to create drama. "Reality" TV at its finest!

Follow the link to read more about the new star of The Hills ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.