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Jack Osbourne

After announcing he was engaged to his girlfriend, aspiring actress Lisa Stelly, last September, Jack Osbourne dropped another bombshell a short time later, while appearing with his parents Ozzy and Sharon on “Piers Morgan Tonight” in October. He was going to be a dad, too! “I’m excited. I’m a little nervous, but excited. It’s fun. I’m not going to do a reality show though,” he told Morgan. Baby Pearl, who weighed 8 pounds, 6 ounces, arrived on April 24, and apparently things are going well. “I freaking love being a dad!” Jack, 26, tweeted in May. “Babies Rock!”

First-Time Dads

Celebs from Jay-Z to Mike Myers to Hugh Grant are celebrating their first Father's Day ever this year thanks to their new bundles of joy.