Getty `Kevin McKidd is addressing speculation that he's heading to the wizarding world of Harry Potter. After it was announced that he's leaving Grey's Anatomy, there have been a lot of rumors swirling of social media that the 52-year-old actor will be playing Arthur Weasley in HBO's upcoming Harry Potter series. The rumors were fueled when eagle-eyed fans noticed that Gracie Cochrane, who is playing Ginny Weasley in the new series, started following Kevin on Instagram. In a new interview with Entertainment Weekly, Kevin addressed rumors. "I saw something about this.