Looks like the Osbournes are about to add to the clan -- Kelly has reportedly been "secretly engaged" to her boyfriend of over a year, chef Matthew Mosshart, for several weeks now.

The couple met in July 2011 at supermodel Kate Moss' wedding and made their relationship paparazzi-official a few months later when they were snapped snogging in public.

"Kelly is the happiest she's ever been," a buddy of the 'Fashion Police' co-host told Us Weekly. "Her career is going well, and she's in a healthy relationship with a wonderful guy."

Kelly herself told a UK publication about her feelings for her newest beau, admitting, "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.”

Her family -- which includes Sharon and Ozzy Osbourne, heroic brother Jack and camera-shy sister Aimee -- approves of the match, with a source confirming that "Matthew is a stand-up guy.”

The “excited” couple have begun planning their nuptials, which will allegedly take place across the pond sometime this summer. And since Black Sabbath recently put aside their differences to record their first studio album in 40 years, maybe they'll also agree to be the most head-bangin' wedding band ever.

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