Kristin Cavallari has stepped in to replace Lauren Conrad on the hit MTV reality series, The Hills, according to The Hollywood Reporter.

MTV publicist Emily Yeomans has confirmed that Cavallari will replace Conrad on the show. The season-five finale on May 31 marks Cavallari's Hills debut.

The 22-year-old aspiring actress caught the bouquet at the April 25 wedding of the series' duo, Heidi Montag and Spencer Pratt. The event was filmed by MTV.

Cavallari became a celebrity in 2004 when MTV tracked her high school love life and rivalry with Conrad on the reality show Laguna Beach: The Real Orange County.

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