Tour unveils Harry Potter magic A general view of 'Hogwarts Castle' at the Harry Potter Studio Tour at Warner Brothers Leavesden S...

Tour unveils Harry Potter magic

A general view of 'Hogwarts Castle' at the Harry Potter Studio Tour at Warner Brothers Leavesden Studios on March 23, 2012 in London, England. The studio, which includes the actual sets and special effects departments where the films were created and shot, goes on public display on March 31, 2012. (Photo by Dan Kitwood/Getty Images)

A woman dressed as Harry Potter character Fleur Delacour walks through the 'Great Hall' at the new Harry Potter Studio Tour at Warner Brothers Leavesden Studios on March 23, 2012 in London, England. The studio, which includes the actual sets and special effects departments where the films were created and shot, goes on public display on March 31, 2012. (Photo by Dan Kitwood/Getty Images)

A model used in the Harry Potter Films is displayed at the new Harry Potter Studio Tour at Warner Brothers Leavesden Studios on March 23, 2012 in London, England. The studio, which includes the actual sets and special effects departments where the films were created and shot, goes on public display on March 31, 2012. (Photo by Dan Kitwood/Getty Images)

A general view of parts of the set at the new Harry Potter Studio Tour at Warner Brothers Leavesden Studios on March 23, 2012 in London, England. The studio, which includes the actual sets and special effects departments where the films were created and shot, goes on public display on March 31, 2012. (Photo by Dan Kitwood/Getty Images)

Two girls look around the set of Dumbledore's office at the new Harry Potter Studio Tour at the Warner Brothers Leavesden Studios on March 23, 2012 in London, England. The studio includes the actual sets and special effects departments where the films were created and shot and goes on public display on March 31, 2012. (Photo by Dan Kitwood/Getty Images)

Visitors walk down Diagon Alley at the Harry Potter Studio Tour at Warner Brothers Leavesden Studios on March 23, 2012 in London, England. The studio, which includes the actual sets and special effects departments where the films were created and shot, goes on public display on March 31, 2012. (Photo by Dan Kitwood/Getty Images)

The new Harry Potter Studio Tour at the Warner Brothers Leavesden Studios in London includes the actual sets and special effects departments where the films were created and shot. The tour will open to the public on Mar. 31.

(Agencies)