Jack Osbourne Shocks His Parents on 'Piers Morgan: "I'm About to Be a Father"

Jack Osbourne announced last night on Piers Morgan Tonight, in front of his parents, Sharon and Ozzy Osbourne: "I'm about to be a father."

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Jack just announced his engagement to Lisa Stelly a couple weeks ago, but he had another big announcement to share last night.

“My life is absolutely insane right now… I guess technically I do have something to tell you. I’m about to be a father,” Jack, 25, told Piers Morgan on Tuesday, with his parents sitting next to him.

“I’m excited. I’m a little nervous, but I’m excited. It’s going to be fun,” he explained on the CNN show. “I’m not going to do a reality show though.”

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So how did his parents react?

Well, Ozzy jumped up, threw his hands in the air and shouted, "My boy! My boy!"

“I’m in shock, I think it’s fabulous,” he said.

And Sharon said, “I’m happy because it’s what Jack wants. So I’m happy. And I’ve always wanted to be a grandma, so it couldn’t be better.”

Jack's sister Kelly shared in the excitement on Twitter, writing, "girls night in w/ @lisamarstelly my future sister in law & mother of my niece/nephew we are so happy the news is out so i can talk about it."

"been waiting 2 say this for so long im the happiest girl in the world im going to be an auntie!" she added. "@lisamarstelly welcome 2 the family i <3 u"

Catch the interview clip, below!