The pitter-patter of tiny feet is soon to be head again in Natalia Vodianova's mega-mansion: the supermodel philanthropist is pregnant with her fourth child.

The baby, which will be her first with luxury mogul beau Antoine Arnault, is due in May 2014 and will be a little brother or sister to the 31-year-old's three children Lucas, 11, Neva, seven and Viktor, six, with property heir Justin Portman. The couple were married for ten years.

The Telegraph reports that Vodianova revealed the news on her personal Facebook page with an anecdote about her appetite.

'One guy (it had to be a guy) who drives me sometimes said back in September to my assistant that I am having a nervous breakdown because I am eating all the time in the car! S))),' she wrote. 'All the family is very excited to welcome in a new little member.'

Her news puts her in the new class of A-list expectant mums: Gwen Stefani and Rachel Zoe are both expecting, Drew Barrymore confirmed yesterday that she's expecting her second child, and those rumours about Kerry Washington just keep persisting...

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