~ Kate's hairdresser has also been seen arriving, wearing a baby car seat. It is not confirmed yet that they will leave the hospital today, although it is likely
UPDATE: It is confirmed now. They'll leave the hospital any moment now.
If you want to see it live -> Live stream
Official confirmation by the Clarence House:
Her Royal Highness The Duchess of Cambridge will be discharged this evening from St. Mary’s Hospital, Paddington.
The Duke and Duchess of Cambridge and their son will travel home to Kensington Palace.
Their Royal Highnesses would like to reiterate their thanks to the hospital for the care and treatment they have all received.