When Alfonso Cuaron asked the heroes of Harry Potter and the Prisoner of Azkaban to write an essay on their characters Daniel Radcliffe (Harry), Rupert Grint (Ron), and Emma Watson (Hermione) all responded very much like their characters would have. Grint blew off the assignment and didn't write one word, Radcliffe wrote a couple pages, and Watson wrote an extensive and detailed report. In an interview with Empire magazine a few weeks ago, Grint admitted that his own personality has merged with his character creating a "Ron-pert" person.
Well Ron's not the only Weasely to be portrayed by someone very much like himself. In a recent interview with Parade James Phelps reveals that he and his twin brother Oliver have at least one striking similarity to Fred and George Weasely: They like to play pranks. more on the Phelps and Deathly Hallows: Part 2