' #Prince William and Kate Middleton' shop for sexy lingerie for Queen's 90th birthday present before visiting ASDA

The Duke and Duchess of Cambridge have been spotted shopping in an ASDA branch with their two young children... or have they?

Shocked shoppers stared as ' Kate ' pushed young ' Princess Charlotte ' in a trolley while doting dad ' Wills ' held ' Prince George 's' hand at the store in Abbeville Apartments in Barking, East London.

But on closer inspection the family shopping trip isn't all it seems.

The Royals are actually look-a-likes taking part in an advert for the supermarket.