Rupert Grint has only appeared in the Harry Potter movies and one other film. That film happens to be (amazingly) the film that Potter co-star Joshua Herdman (Goyle) appeared in as well titled Thunderpants (2002). Aside from that amazing coincidence, Rupert Michael Grint was born on August 24, 1988 in Hertfordshire, England, UK. He only did school plays until he got the break of a lifetime by being cast as Ron Weasley in the Harry Potter movies. Source