Luke Worrall Kelly Osbourne Engagement Engagement Announced On Facebook! Luke Worrall, the 19-year-old model, has announced the engagement with his 24-year-old girlfriend Kelly Osbourne on his Facebook (see screenshot screenshot above). Kelly Osbourne was spotted wearing a diamond ring on her engagement finger recently. According to reports, Worrall and Osbourne, who has been dating for six months, are planning a Las Vegas wedding. So, the young couple are very serious, right? Happy Engagement!