In school, Fred was Sorted into Gryffindor and developed a reputation for mischief alongside his brother George. He and his brother were rather popular students; Beaters for the Gryffindor Quidditch team and later members of Dumbledore's Army. As soon he was of age, Fred joined the Order of the Phoenix with his twin, fighting in both the Battle of Cokeworth in 1997 and the Battle of Hogwarts in 1998, where he suffered the loss of his father Arthur.
After the war, Fred saw his joke shop become a major business alongside his brothers George and Ron. Fred married Audrey Fairfax, a Muggle-born ministry employee who worked under his brother Percy's department, and had two children; Oliver George and Nigel Lee Weasley. He also adopted her orphaned Muggle nephew, Tristan, after his parents died in a car accident.