King's Cross railway station, also known as London King's Cross, is a Central London railway terminus on the northern edge of the city. It is one of the busiest railway stations in the United Kingdom, being the southern terminus of the East Coast Main Line to North East England and Scotland.
Platform 9 3/4 was actually filmed under the arched wall between platforms 4 and 5.
There is a photo opportunity close to the real platform 9 itself of the platform 9 3/4 sign with a trolley lodged halfway into the wall to create the effect of it going through the wall en-route to Hogwarts.
Don't forget to shop at The Harry Potter Shop: http://www.harrypotterplatform934.com/
Daniel Radcliffe, Rupert Grint
Harry Potter has lived under the stairs at his aunt and uncle's house his whole life. But on his 11th birthday, he learns he's a powerful wizard—with a place waiting for him at the Hogwarts School of Witchcraft and Wizardry. As he learns to harness his newfound powers with the help of the school's kindly headmaster, Harry uncovers the truth about his parents' deaths—and about the villain who's to blame.