Piers Morgan sat down with some of the Osbourne clan on his show tonight and Jack Osbourne had some big news to share -- he's going to be a father!

As their interview was coming to a close, Jack made the revelation that he and his fiance Lisa Stelly are expecting their first child, making Ozzy and Sharon Osbourne first-time grandparents.

Hear Jack go in depth regarding the big baby news on tomorrow's episode of The Talk.

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