The Perth-born model, who currently lives in new York, already shares one child with partner David Letts - two-year-old Naia.
The Vogue cover girl made her debut at Australian Fashion week at the age of 15, launching her into international fame.
Ward, who was named the world’s tenth highest earning model by Forbes in 2007, has since walked for the likes of Oscar De La Renta, Vera Wang, Prada and Yves Saint Laurent.