Filming of the Harry Potter and the Half-Blood Prince movie started on the 8th of February 2008 at Gloucester Cathedral. Most stars came to their beloved Hogwarts School of Witchcraft and Wizardry.

Some stars were spotted arriving there, for example: Daniel Radcliffe (Harry Potter), and Rupert Grint (Ron Weasley). There was no sign of Emma Watson, (Hermione Granger).

Many fans were waiting for their beloved actors. Alan Rickman was later caught on camera as well. He was in full make-up as Professor Snape.

There are even some award-winning competitions, make a photo of an actor and get $20! Try to catch one.