Jamie Oliver has promised his fifth child will have a ''hippy'' name.

The 41-year-old celebrity chef - who already has Poppy, 14, Daisy, 13, Petal, seven, and five-year-old Buddy, with his wife Jools - admitted he'll leave choosing their baby's moniker to his spouse, but just like their other kids' names, they won't be choosing anything conventional.

Jamie said: ''I think you can guess something floral or from the natural world. We might go with seasons this time - it's going to be a little bit hippy, whatever happens.

''I'll pretend to have a say in the name, but I really have no say.''

Jools is due to give birth next month, and though the couple don't know the sex of the baby, Jamie is hoping for another boy as he and Buddy are ''overwhelmed'' being the only males in the family.

He told Britain's OK! magazine: ''[I'd like a boy] for balance - Buddy and I are overwhelmed and I feel vulnerable.

''A little bit more testosterone would really help, I think, and Jools agrees.

''But seriously, we don't know what the baby is going to be and I'll be grateful for the same arrival of whatever we get.''

The former 'Naked Chef' star has been busying himself with the practical problems associated with having a larger family.

He said: ''I've had to address the transportation problem and I'm in the process of acquiring a new vehicle.''

And Jamie's other kids can't wait for the arrival of their new brother or sister.

He said: ''The other kids are all beyond excited. Poppy was so thrilled that she cried with joy.''