Celebrity chef Jamie Oliver and his wife Jools are the proud parents of a baby boy, born Wednesday in London. The occasion marks their fourth child. The 'Jamie Oliver's Food Revolution' star made the announcement much like he did with his last child, back in April 2009, with happy words and a photo on Twitter.

"It's a baby boy guys!!! I'm shock(ed), we're all very happy, mum was amazing and both are well and happy x4 kids!!" he exclaimed with a link to a shot of his hours-perhaps-minutes-old baby, whom they are calling "Buddy" until a full name can be chosen.

The Olivers are known for incorporating flowers into their children's names, so expect the unexpected. The baby boy joins three sisters, Petal Blossom Rainbow, 17 months, Daisy Boo Pamela, 6, and Poppy Honey Rosie, 8.