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Jack Osbourne Gets Engaged to Model Lisa Stelly

Jack Osbourne
Larry Busacca/Getty Images

"im so happy for you & lisa!" writes his sister, E! Fashion Police host Kelly.

Reality star Jack Osbourne is engaged to model and aspiring actress Lisa Stelly.

Stelly announced the news on Twitter on Thursday.

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"The most amazing man I've ever met asked me to marry him ... and he wasn't joking! Crazy, right," she wrote.

Osbourne's sister, Kelly Osbourne, congratulated the couple on Twitter.

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"@MrJackO well i guess you're not my little brother anymore i'm so unbeliveably proud of the man you have become! im so happy for you & lisa!" wrote the co-host of E!'s fashion police Friday morning.

Jack and Kelly Osbourne rose to fame on their MTV reality show The Osbournes. Earlier this year, Jack produced a documentary about his famous rocker dad called God Bless Ozzy Osbourne.

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His mom, Sharon Osbourne, most recently co-anchored CBS' The Talk.