Ad-libbed Lines
When the actors forgot their lines, they improvised. The actors began incorporating improvised lines to scenes until they became familiar with their roles. Since he missed the actual one, Tom Felton (Draco Malfoy) improvises the line “I didn’t realize you could learn” to his friend Goyle in one scene.
Ron Was Supposed To Look Different
Ron is described in the books as “tall, thin and gangling, with freckles, big hands and feet, and a long nose.” Rupert Grint would have to have had to have a longer nose, more freckles, and a fiery red mane like the rest of his family in order to resemble Ron in the books. And don’t forget about his trademark sparkling blue eyes. Nonetheless, we think that Rupert is quite similar to J.K. Rowling’s depiction of Ronald Weasley.