A fan imitates Harry casting the Lumos
Pottermania is an informal term first used around 1999 describing the craze Harry Potter fans have had over the series. Fans held midnight parties to celebrate the release of the final four books at bookstores which stayed open on the night leading into the date of the release. In 2005, Entertainment Weekly listed the midnight release of Harry Potter and the Goblet of Fire as one of "Entertainment's Top Moments" of the previous 25 years.
Diehard fans of the series are called "Potterheads". Some even theme their weddings around Harry Potter. A Bridal Guide featured two real weddings soon before the release of the final movie, which quickly spread through the fandom via Facebook, , and Tumblr.
The craze over the series was referenced in Lauren Weisberger's 2003 novel The Devil Wears Prada as well as its 2006 film adaptation. In the story, the protagonist Andrea Sachs is ordered to retrieve two copies of the next instalment in the series for her boss's twins before they are published so that they can be privately flown to France, where the twins and their mother are on holiday.
Some celebrities who are fans of Harry Potter include Lily Allen, Guillermo del Toro, Stephen King, Keira Knightley, Jennifer Lawrence, Evanna Lynch, Liam Neeson, Barack Obama, Simon Pegg, Seth Rogen, and Matt Smith.