Jack Osbourne has proposed to model girlfriend and aspiring actress, Lisa Stelly following a whirlwind romance.

The couple had been dating for just four months when Jack popped the question earlier this week.

Taking to her twitter account, Stelly confirmed the news, gushing: “The most amazing man I’ve ever meet asked me to marry him…and he wasn’t joking! Crazy, right?”

Kelly Osbourne has since congratulated her younger brother, tweeting: “well I guess you’re not my little brother anymore I’m so unbelievably proud of the man you have become! Im so happy for you & lisa!”

Twenty-five year old Jack shot to fame in 2002 when his family appeared on MTV reality show ‘The Osbournes.’ However more recently he has expressed an interest in directing and producing. The aspiring director has produced a documentary film entitled, ‘God Bless Ozzy Osbourne,’ which will be released on DVD November 15th.