The celebrity chef and his wife Jools welcomed their third daughter early Friday morning in London.
Petal Blossom Rainbow was born at 2:46 a.m. and weighed in at 6 pounds, 10 ounces.
Petal joins sisters Poppy Honey, 6, and Daisy Boo, 5.
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“Jamie and Jools are both completely smitten with Petal already and Jamie is looking forward to two weeks paternity leave to spend time with his four beautiful girls,” his rep tells US magazine.
The couple has been married for eight years.