Everybody wants to write to someone. Here's loads of addresses you can try.               You should know that you absolutely positively must be a UK resident to be in a HP movie.               For information on casting and auditions, you can try to contact casting director Karen Lindsay Stewart at this address: Karen Lindsay-Stewart - Harry Potter Production P.O. Box 2301 - London W1A 1PT - United Kingdom Telephone (Office): 020 7439 0544 Fax: 020 7439 0548                   Rupert Grint Peter Fraser & Dunlop Drury House 34-43 Russell St. London WC2B 5HA , UK   Daniel Radcliffe - Harry Potter c/o Harry Potter Production Leavesden Studios PO Box 3000 Leavesden, Hertfordshire WD2 7LT, UK           Robbie Coltraine - Hagrid 19 Sydney Mews London SW3 6HL UK   Emma Watson - Hermione Granger c/o Harry Potter Production Leavesden Studios PO Box 3000 Leavesden, Hertfordshire WD2 7LT UK           Chris Rankin - Percy Weasley c/o Ken McReddie Ltd. 91, Regents Street London W1R 7TB UK   Chris Columbus - Director c/o 1492 Pictures 4000 Warner Blvd., Bldg. 139 Rm. 118 Burbank, CA  91522  USA           John Cleese - Nearly-Headless Nick 115 Hazlebury Rd.  London SW6 2lX  UK   Kenneth Branagh - Gilderoy Lockhart [Film #2] Shepperton Studios  Studios Road Shepperton Middlesex TW17 OQD England           Julie Walters - Molly Weasley c/o ICM  76 Oxford Street  London W1N 3HN  UK   Ian Hart - Quirrell Peter Fraser & Dunlop Drury House 34-43 Russell St. London WC2B 5HA UK           Kenneth Branagh - Gilderoy Lockhart [Film #2] Shepperton Studios  Studios Road Shepperton Middlesex TW17 OQD England   John Williams - Composer 333 Loring Springs Los Angeles, CA 90024 USA           JK Rowling - Author c/o Scholastic Books 555 Broadway New York, NY 10012 USA -or- c/o Bloomsbury Publishing Place  38 Soho Square  London W1V 5DF  UK    Actor's Name Here c/o Harry Potter Production Leavesden Studios PO Box 3000 Leavesden, Hertfordshire WD2 7LT UK