The 31-year-old fashion icon and her 27-year-old beau who became parents to daughter Marlowe last summer (12), has agreed to become the new faces of the brand's autumn/winter (13) advertisements, according to the New York Post's Page Six column.

The celebrity couple will join the likes of actress Emma Watson, supermodel Kate Moss and David and Victoria Beckham's 10-year-old son Romeo, who have all posed for the high-end label.

An official announcement is expected in the coming months.