Fred and George are the identical twin sons of Arthur and Molly Weasley and the younger brothers of Bill, Charlie and Percy. They are older brothers of Ron and Ginny, who are both members of Harry Potter's close group of friends.
The twins revel in practical jokes and pranks and are generally considered amusing by both the books' characters and readers. Fittingly, they were born on April Fools Day – 1st April 1978.
While their best friend is Lee Jordan - their classmate, dormmate and fellow prankster - the twins are also good friends with Harry, having played Quidditch with him for Gryffindor. In fact, they generally treat Harry better than they do Ron; they love to torment Ron and Percy but are close with Ginny (who closely resembles them both in appearance and personality) and vice versa. Like the other Weasleys, they have flaming red hair and are described as being on the shorter, stockier side like their second older brother Charlie. They seem to be quite popular among the Gryffindors, as well as with students in other Houses and with some teachers.
In the film adaptations, Fred and George are played by real-life twins James and Oliver Phelps. Ironically, the Phelps twins are quite tall and lanky, while the twins are described in the books as short and stocky. The actors are also not natural redheads and have their hair dyed for the films.