London, July 10 : Veteran actress Julie Walters has revealed that she suffered wand arm after filming fight scenes in 'Harry Potter And The Deathly Hallows: Part 2'. The 61-year-old, who plays Ron Weasley's mother Molly, fought with villainess Bellatrix Lestrange played by actress Helena Bonham Carter in the action-packed sequences."We had to film the fight scenes several times, it was