As if there isn’t enough drama on The Hills!

Leading lady Lauren Conrad may have more Heidi Montag-esque feuds on the way if her supposed pageturner hit bookshelves.

The 22-year-old budding fashion designer is reportedly penning a juicy tell-all detailing the salacious going-downs of the young Hollywood social circle she’s part of, a source reveals to OK!.

Among those reviled in the tome? Laguna Beach‘s Kristin Cavallari, with whom LC reignites an old feud.

“A chapter got leaked to Kristin,” a friend tells OK!. “It talks about her ‘sleeping around Laguna’ and stealing Stephen Colletti.”

The digs aren’t just aimed at her reality show cohorts, but at socialites Nicole Richie and Paris Hilton as well. But when 27-year-old Paris confronted Lauren — who is using a pseudonym — about the book, Lauren assured her nothing was in the works. But pals of Paris aren’t convinced.

“We all know she’s just trying to save face!” Paris’ friend tells OK!.

A rep for Lauren says there’s "no truth" to the book.

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