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Ollivander, played by John Hurt, is the elderly proprietor of Ollivanders, a wand shop in Diagon Alley. He possesses exceptional wandmaking skills and is renowned throughout the wizarding world for his expertise in crafting wands that best match the abilities and personalities of their owners. Ollivander's interactions with Harry and his guidance in wand selection play a significant role in the protagonist's journey throughout the Harry Potter series.