Kelly Osbourne: Engaged to Matthew Mosshart!

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Kelly Osbourne has a secret, and she can no longer keep it:

The celebrity fashion expert is engaged to Matthew Mosshart!

The couple has reportedly been dating for about a year and quietly agreed to marry a few weeks prior to Christmas, an insider confesses to Us Weekly.

Lisa Osbourne, Jack Osbourne, Kelly Osbourne, Baby Minnie, and Ozzy Osbourne

"Kelly is the happiest she's ever been," the Osbourne friend says. "Her career is going well, and she's in a healthy relationship with a wonderful guy."

Speaking to British magazine Fabulous in October, Kelly gushed of her now-fiance:

"I couldn't believe that he truly liked me because I never think people ever could. But I'm so happy. I don't think I've ever really known what love is like before."

Awwww! We send these two our very best wishes.

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Kelly Osbourne Biography

Kelly Osbourne and Sonogram
Kelly Osbourne rose to fame because her father is a drugged out rock star and her mother an attention-starved judge on America's Got... More »
London, England
Full Name
Kelly Michelle Lee Osbourne