Harry Potter and the Chamber of Secrets is a fantasy novel written by British author J. K. Rowling and the second novel in the Harry Potter series. The plot follows Harry's second year at Hogwarts School of Witchcraft and Wizardry, during which a series of messages on the walls of the school's corridors warn that the "Chamber of Secrets" has been opened and that the "heir of Slytherin" would kill all pupils who do not come from all-magical families. These threats are found after attacks that leave residents of the school petrified. Throughout the year, Harry and his friends Ron and Hermione investigate the attacks.

Fred and George Weasley are fictional characters in the Harry Potter book series written by J. K. Rowling. The characters are the identical twin brothers of the Weasley family, making them the older brothers to Ron and Ginny and friends of Harry Potter. They are initial members of Dumbledore's Army later joining the Order of the Phoenix after their departure from Hogwarts. They are also the founders of Weasleys' Wizard Wheezes in Diagon Alley, a shop they opened post-graduation to sell their mischievous pranks. The twins were played by identical twin brothers James and Oliver Phelps in the film adaptations of the books.