The fictional universe of British author J. K. Rowling's Harry Potter series of fantasy novels comprises two distinct societies: the wizarding world and the Muggle world. In the novels, the Muggle world is the world inhabited by the non-magical majority, with which the wizarding world exists coextensively, albeit mostly remaining hidden from the non-magical humans. The plot of the series is set in 1990s Britain, but in a veiled and separate shadow society wherein magic is commonly used and practised, and those who can use it live in self-enforced seclusion, hiding their abilities from the rest of the world. The term "wizarding world" refers to the global wizard community that lives hidden in parallel with the Muggle world; the different terms refer to different communities within the same area rather than separate planets or worlds. Any new works taking place in this universe are released under the "J. K. Rowling's Wizarding World" brand.

The Order of the Phoenix is a secret organisation in the Harry Potter series of fiction books written by J. K. Rowling. Founded by Albus Dumbledore to fight Lord Voldemort and his followers, the Death Eaters, the Order lends its name to the fifth book of the series, Harry Potter and the Order of the Phoenix. The original members of the Order of the Phoenix include Sirius Black, Emmeline Vance, Benjy Fenwick, Kingsley Shacklebolt, Edgar Bones, Lily Potter, James Potter, Sturgis Podmore, Caradoc Dearborn, Alice Longbottom, Frank Longbottom, Dorcas Meadowes, Albus Dumbledore, Rubeus Hagrid, Hestia Jones, Remus Lupin, Severus Snape, Aberforth Dumbledore, Dedalus Diggle, Minerva McGonagall and Marlene McKinnon.