Stephanie Pratt, formerly of MTV's The Hills, has spoken out against former Fashion Police host Kelly Osbourne, who she claims stole her boyfriend.

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In 2010, following the final season of The Hills, Pratt was dumped by her then-boyfriend, Josh Hansen, and while she was initally consoled by her then-friend, Osbourne, she quickly realized Osbourne was no friend.

“I’m so sorry. Josh is the worst, such a d---head,” Pratt claims Osbourne told her after their split. “Just keep hanging out with us, you can do so much better, forget about him.”

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Then, as Radar Online revealed, Pratt discovered Osbourne had begun dating Hansen on Perez Hilton’s website.

“I see an article about Kelly Osbourne and Josh Hansen on a date!” she wrote in her new memoir, Made In Reality. “Part of me was glad to have made up my mind that this guy was good for nothing, but most of me just felt heartbroken.”

One year later, the former Hills star, who also appeared on the UK's Made in Chelsea, ran into her former friend, Osbourne, whila auditioning for a role on Fashion Police.

“It was down to the final two for that role, me and Kelly Osbourne, and, as you know, it went to Kelly…I wanted to be furious about that, especially after what had happened between us over Josh. But I decided not to think about Kelly much after that.”

For more Stephanie Pratt, check out her shocking interview below.

Tags: Kelly Osbourne stephanie pratt josh hansen The Hills MTV Reality TV E!