Question: Robbie Coltrane is known for his film roles as a fictional character based on a book series written by who?
Related documents: [0]  [DOC] Robbie Coltrane, OBE (born Anthony Robert McMillan; 30 March 1950) is a Scottish actor and author. He is known for his roles as Rubeus Hagrid in the "Harry Potter" films, as Valentin Dmitrovich Zukovsky in the James Bond films "GoldenEye" and "The World Is Not Enough," and as Dr. Eddie "Fitz" Fitzgerald in the British TV series "Cracker" during the 1990s. [END] 
[1]  [DOC] Rubeus Hagrid is a fictional character in the "Harry Potter" book series written by J. K. Rowling. He is introduced in "Harry Potter and the Philosophers Stone" as a half-giant and half-human who is the gamekeeper and Keeper of Keys and Grounds of Hogwarts, the primary setting for the first six novels. In the third novel "Harry Potter and the Prisoner of Azkaban", Hagrid is promoted to Care of Magical Creatures teacher, and is later revealed to be a member of the Order of the Phoenix. [END] 
Answer: 
J. K. Rowling
J. K. Rowling