Harry Potter fans in costume

by SheKnows
Jul 12, 2011 at 5:52 p.m. ET
Fans sport glasses and posters. Andres Otero)

1 /8: Gryffindor Pride

1/8 :Gryffindor Pride

At the world premiere of Harry Potter and the Half Blood Prince, some of the crowd dressed as Quidditch fans.

2 /8: Harry Potter Gallows Party at Borders in Washington, D.C.

2/8 :Harry Potter Gallows Party at Borders in Washington, D.C.

Fan dressed as Hermione (Photo supplied by Carrie Devorah/WENN)

3 /8: Harry Potter Gallows Party at Borders in Washington, D.C.

3/8 :Harry Potter Gallows Party at Borders in Washington, D.C.

Costumed Ron Weasley (Photo supplied by Carrie Devorah/WENN)

4 /8: Harry Potter and the Deathly Hallows book release at Eastons Book Store in Dublin, Ireland

4/8 :Harry Potter and the Deathly Hallows book release at Eastons Book Store in Dublin, Ireland

Boys dressed as Harry Potter (Photo supplied by WENN)

5 /8: Harry Potter and the Deathly Hallows book release at Eastons Book Store in Dublin, Ireland

5/8 :Harry Potter and the Deathly Hallows book release at Eastons Book Store in Dublin, Ireland

Girls honor Harry Potter (Photo supplied by WENN)

6 /8: Book release for Harry Potter and the Deathly Hallows at Waterstone's Piccadilly in London

6/8 :Book release for Harry Potter and the Deathly Hallows at Waterstone's Piccadilly in London

Eager fans dress as Hogwarts' staff and most famous student (Photo supplied by Joe Maher/WENN)

7 /8: Book release for Harry Potter and the Deathly Hallows at Waterstone's Piccadilly in London

7/8 :Book release for Harry Potter and the Deathly Hallows at Waterstone's Piccadilly in London

Fans wear Beauxbatons Academy of Magic girls' costumes (Photo supplied by Joe Maher/WENN)

8 /8: Book release for Harry Potter and the Half-Blood Prince at Oxford Street's Waterstone's in London

8/8 :Book release for Harry Potter and the Half-Blood Prince at Oxford Street's Waterstone's in London

A group of witchy fans (Photo supplied by Nigel Hine/WENN)