And baby makes three! Just two weeks after getting engaged to fiancee Lisa Stelly, Adrenalin Junkie star Jack Osbourne announced that he's preparing for the pitter-patter of little feet. Osbourne revealed the news during an appearance on Piers Morgan Tonight with parents Ozzy and Sharon. While talking about what's going on in his life, he told the CNN talk show host, "My life is absolutely insane right now. I guess technically I do have something to tell you. I'm about to be a father. I'm excited. I'm a little nervous, but I'm excited. It's going to be fun." But don't expect to see Jack (or Jackie) Jr. on a reality show. He said he has no intention of letting his little one follow in his footsteps. "I'm not going to do a reality show, though!" "Crazy Train" singer and grandpa-to-be Ozzy said although he was surprised by the sudden news, he's happy about the impending arrival of Baby Osbourne. The rocker tells Morgan, "I'm in shock. It's fantastic. It doesn't matter what I think. The baby's on its way." Meanwhile, Sharon said she looks forward to her new role as a grandmother. Says The Talk host, "I'm happy because it's what Jack wants. And so I'm happy and I've always wanted to be a grandma." One person who couldn't say enough about the baby was Jack's sister Kelly. Once the word was out, she immediately took to the Twitterverse saying, "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! @lisamarstelly welcome 2 the family i <3 u (sic)."