It's a boy for Jamie Oliver and wife Jools.
"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!!" the celebrity chef tweeted on Wednesday.
Oliver, 35, has not released a name, but is calling the newborn "Buddy" on Twitter. "Full name to come from mum," he tweeted. He included two pictures of the baby.
Earlier this month, Oliver's Emmy-winning show, Jamie Oliver's Food Revolution, was picked up for a second season.
"Buddy" Oliver is the fourth child for Oliver and Jools, who have three daughters: Petal Blossom Rainbow, 17 months, Daisy Boo Pamela, 6, and Poppy Honey Rosie, 8.
Perhaps the naming delay is due to the lack of floral-themed monikers for males.