Fred and George Weasley

Fred Weasley and George Weasley were identical twin wizards

born on 1 April, 1978 to Arthur and Molly Weasley. Brilliant pranksters, they co-founded and ran the joke shop Weasleys' Wizard Wheezes and were members of both Dumbledore's Army and the Order of the Phoenix.

The twins departed from Hogwarts sometime after the Easter Holidays in 1995 in a final act of rebellion against Dolores Umbridge and the Inquisitorial Squad. After leaving school, the twins went on to open their joke shop, Weasleys' Wizard Wheezes, which was made possible because Harry Potter had given them his Triwizard earnings.

The twins were famous for their pranking and mischief at the school. They were highly skilled in magic and created an entire line of magical joke items known as "Weasleys' Wizard Wheezes". According to their brother Ron, they had good grades, but they only received six O.W.L.s combined. Both of them played as Beaters on the Gryffindor Quidditch team.

Fred: "He never managed to get all the words out, due to the fact that we forced him head-first into that Vanishing Cabinet on the first floor."

Hermione: "But you’ll get into terrible trouble!"

Fred: "Not until Montague reappears, and that could take weeks, I dunno where we sent him."

— Fred Weasley on him and his twin George pushing Montague into the Vanishing Cabinet in 1996

• Fred Weasley — Brother of Bill, Charlie, Percy, Ron, and Ginny, and son of Molly and Arthur Weasley. Twin brother of George Weasley. "Rapier" and "Rodent" on Potterwatch. Died in the Battle of Hogwarts on 2 May,1998.

• George Weasley — Brother of Bill, Charlie, Percy, Ron, and Ginny, and son of Molly and Arthur Weasley. Twin brother of Fred Weasley. Lost an ear in the Battle of Seven Potters. George survived the Second Wizarding War and went on to marry Angelina Johnson and have two children, Roxanne and Fred (named after his late brother).

From harrypotterwiki =)