Along with all the fans who were there, many wearing robes and carrying wands, Eddie Redmayne, who played Newt Scamander in Fantastic Beasts and Where to Find Them, and Jude Law, who will play a young Albus Dumbledore in the upcoming sequel, appeared.
They counted down to the departure of the Hogwarts Express with the crowd and even tried to make their way through the barrier to Platform 9 3/4, though it appears they were not met with success.
September 1 is the official start of the term according to the books by J.K. Rowling, and so it is on that day that fans gather at the actual King’s Cross Station where the characters board the Hogwarts Express.