Ron Weasley was introduced by Rowling as “tall, thin and gangling, with freckles, big hands and feet, and a long nose.”[PS Ch.6] Ron has the trademark red hair of the Weasleys and is indeed one of Harry’s tallest schoolmates, even outgrowing some of his older brothers. Rowling states in the novels that Ron has freckles, though Rupert Grint, the actor who plays Ron, has none. Rowling has also stated that Ron has blue eyes.
Rowling in an interview described Ron as very funny but insensitive and immature, “There’s a lot of immaturity about Ron, and that’s where a lot of the humor comes from.” As his first exercise with the actors who portray the central trio, Alfonso Cuarón, who directed the third film in the series, Prizoner of Azkaban, assigned them to write an autobiographical essay about their character, written in the first person, spanning birth to the discovery of the magical world, and including the character’s emotional experience. Of Rupert Grint’s essay, Cuarón recalls, “Rupert didn’t deliver the essay. When I questioned why he didn’t do it, he said, ‘I’m Ron; Ron wouldn’t do it.’ So I said, ‘Okay, you do understand your character.'” Commenting on Ron’s character development in the final book, Rowling explained that “Ron is the most immature of the three main characters, but in part seven he grows up. He was never strong footed, people see him mostly as Harry’s friend; his mother had actually wanted a girl and in the last book he finally has to acknowledge his weaknesses. But it’s exactly that which makes Ron a man.”