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Jack Osbourne, 27, and his wife Lisa Osbourne, 26, are wasting no time in growing their family. Just 16 months after Pearl Clementine was born, the couple announced they are expecting again.

Lisa Osbourne posted the good news on her blog raddestmom.com, saying, "Jack and I are super excited to share with you all that we are expecting our second baby!"

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She is in her second trimester, feeling great and very excited for the expanding family.

"Pearl will have a little brother or sister to play with," she added. "It's crazy to think that we will soon be a family of four!"

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The couple was married last October in Hawaii, and this will be the second grandchild for Jack's father, rock legend Ozzy Osbourne, 64.