London, March 5 (IANS) Celebrity chef Jamie Oliver is set to become a dad for the fourth time.

Oliver's wife, model and writer Jools, is due to give birth in September and the pair are said to be 'delighted'. The couple welcomed daughter Petal Blossom Rainbow on April 2009. They also have two other daughters - Poppy Honey and Daisy Boo - reports mirror.co.uk.

'Jamie and Jools Oliver are delighted to announce that they are expecting their fourth child,' a statement on behalf of the couple said.