premise: Ron Weasley is only part of the Game of Thrones series.
hypothesis: Dumbledore 's Army ( or D.A. for short ) is a fictional student organisation in J. K. Rowling 's Harry Potter series that is founded by the main characters , Harry Potter , Ron Weasley and Hermione Granger , to stand up against the regime of Hogwarts High Inquisitor Dolores Umbridge , as well as to learn practical Defence Against the Dark Arts . Ronald Bilius `` Ron '' Weasley is a fictional character in J. K. Rowling 's Harry Potter series . His first appearance was in the first book of the series , Harry Potter and the Philosopher 's Stone as the best friend of Harry Potter and Hermione Granger . Along with Harry and Hermione , he is a member of the Gryffindor house . Rupert Alexander Lloyd Grint ( born 24 August 1988 ) is an English actor who rose to prominence playing Ron Weasley , one of the three main characters in the Harry Potter film series .