Jack Osbourne, Lisa Stelly Engaged After Four Months of Dating

Jack Osbourne, the 25-year-old son of Black Sabbath rock legend Ozzie Osbourne and America’s Got Talent judge Sharon Osbourne, is engaged to be married.

After only four months of dating, US magazine reports that the British reality star popped the question to his model/aspiring actress girlfriend Lisa Stelly.

Osbourne’s rep confirmed the happy news — and so did the bride-to-be on Twitter.

“The most amazing man I’ve ever met asked me to marry him… and he wasn’t joking! Crazy, right :)” Stelly tweeted.

Kelly Osbourne, Jack’s sister, also took to Twitter to give her bro a virtual “pat on the back.”

“I’m so happy for him. It’s so lovely,” Kelly tweeted on Friday. “I have to say this is the first girl he’s ever introduced me that I actually liked. It was like instant. I knew as soon I met her it was all over. They were going to end up together forever. I couldn’t be happier for them.”

In addition to working his romantic mojo on his now-finance’, young Osbourne has been busy at work behind the camera as well, working as both a producer and a director.

He recently produced God Bless Ozzy Osbourne, a documentary about his father, which tells his story through his son’s eyes. Jack recently discussed documentary – due to be released on DVD Nov. 15 – and his relationship with his dad on Howard Stern’s show.

Watch that interview below: