William Arthur "Bill" Weasley is the eldest son of Arthur and Molly Weasley. He is described to be "hard-working" and "down-to-earth", but possesses a fondness for "a bit of adventure, a bit of glamour". During his time at Hogwarts, Bill becomes both a prefect and Head Boy, with 12 O.W.L.s to his credit. Later, he works for Gringotts Bank in Egypt as a Curse-Breaker.
He makes his first full appearance in Harry Potter and the Goblet of Fire, where he is described as being a good-looking young man, sporting long red hair tied back in a ponytail and a single fang earring. When Fleur Delacour spies Bill at Hogwarts as he and Mrs Weasley paid a visit to Harry during the Triwizard Tournament, she eyes him with "great interest." Bill returns to Britain to work with the Order in Harry Potter and the Order of the Phoenix. He met Fleur at Gringotts head office in London where she was employed at the time, giving her lessons to improve her English. After a yearlong relationship, the couple was engaged, and Bill brought his fiancée to get to know his family.Bill fought in the Death Eaters' attack at Hogwarts near the end of Harry Potter and the Half-Blood Prince, but did not escape unscathed, as he was attacked by werewolf Fenrir Greyback. However, since Greyback was in his human form at the time of the attack, Bill suffered only partial lycanthropy contamination. In Harry Potter and the Deathly Hallows Fleur and Bill take part in getting Harry escorted safely from the Dursleys' house, and they witness Mad-Eye Moody being killed by Voldemort himself, which they announce upon their return to the Burrow. The couple have their wedding there, and later provide safe haven for the trio and several others in Shell Cottage after they narrowly escape Malfoy Manor. Both Bill and Fleur were combatants for the Order during the Battle of Hogwarts and both survived the battle. Bill and Fleur have three children: Victoire, Dominique and Louis.