Kate Middleton and Meghan Markle will play an important supporting role as the Queen's coffin is transported through London.
The royal procession will commence at 2.22pm on Wednesday with Her Majesty's casket expected to arrive at Westminster Hall at 3pm.
Members of the Royal Family will walk in procession behind the Queen's coffin including all four of her children – King Charles III, Princess Anne, Prince Andrew and Prince Edward.