The Queen, dressed in a pink jacket and wearing pearl jewellery, sat in a black cab that drove past the spectators camped outside the hospital.
Except it was not Queen Elizabeth II but a very lifelike wax statue of the British monarch.
It's not clear whose idea it was to prank the audience outside St. Mary's Hospital, but we have to admit, it was a good one.
On Monday, Prince William and Kate Middleton became third-time parents to a baby boy, who will be fifth in line to the British throne. Kensington Palace said the baby was born at 1001 GMT and weighs 8 lbs 7oz (3.9 kg). William was present for the birth at St Mary's Hospital in west London where their other two children, George and Charlotte, were also born, it added. Elder siblings Prince George and Prince Charlotte posed for cameras as they arrived at the hospital to meet their younger brother.
Albert, Arthur, and Fred are among the top favourite names with bookmakers for the royal baby boy.
Congratulations poured in from world over for the new parents, including one from former FLOTUS Michelle Obama who, in a tweet, said she looked forward to meeting the new prince for a pajama party. Click for more trending news