Model and actress Natalia Vodianova has given birth to her fourth child.

The Russian beauty delivered son Maxim on 2 May (14). He is her fourth child and her first with boyfriend Antoine Arnault, Ceo of footwear maker Berluti.

Vodianova announced the news by sharing a picture on showing her newborn's lower half lying on a visitor's lap in hospital.

The model writes, "Last night at 2.45am was born our baby boy Maxim. Living up to the definition of his name, he was born an incredible 4.2kg (9lbs 3oz) and 55cm (21 inches). The baby and I are doing beautifully well, to the delight of the proud daddy. Thank you for all your good wishes, I would now like to pass them on to all women who are still expecting. Enjoy every minute of it."

Vodianova has three children with estranged husband Justin Portman, from whom she split in 2011.