Celebrity Jack Osbourne Is Engaged to Lisa Stelly The son of Ozzy and Sharon Osbourne plans to marry actress Lisa Stelly By People Staff Published on September 30, 2011 11:10 AM Share Tweet Pin Email Photo: Paul Archuleta/FilmMagic Jack Osbourne is ready to tie the knot. The 25-year-old son of Sharon and Ozzy Osbourne has proposed to his girlfriend, actress Lisa Stelly, his rep confirms. As Stelly, 26, Tweeted: “The most amazing man I’ve ever met asked me to marry him….and he wasn’t joking! Crazy, right? :).” The couple have been dating for four months, reports Britain’s Daily Mail. Jack recently produced a documentary about his father, God Bless Ozzy.– Liz Raftery and Blaine Zuckerman