Gellar and Green in 2008 - Neilson Barnard/Getty ImagesFrom slaying vampires to Swifties watching Taylor slay. Buffy the Vampire Slayer alums Sarah Michelle Gellar and Seth Green reunited over the weekend at Taylor Swift's August 5 Eras Tour show in Los Angeles. Gellar, 46, shared a photo of her and Green, 49, posing for a selfie to Instagram on Sunday amid a slideshow of all her favorite memories from the epic night out. "Officially in my Eras Era," she wrote in the caption. "Look who I found @sethgreen," she captioned another snap, making a kissy face near the ch...