Jack Osbourne's going to be a dad

A couple of weeks ago Jack Osbourne got engaged. Now he's having a baby.

And on top of that, he's only been dating his fiancée , aspiring actress Lisa Stelly for four months.

Whirlwind, much?

25-year-old Jack broke the baby news on CNN Tonight, and admitted that he's got some pre-childbirth jitters.

"I'm excited. I'm a little nervous," he told presenter Piers Morgan on the show.

The rest of the Osbourne family seems pretty excited too. After news of Lisa and Jack's engagement, soon-to-be sister-in-law, Kelly Osbourne tweeted: '@MrJackO 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!'

This will be Jack and Lisa's first child together. Congratulations!