Charisma Carpenter has a huge crush on Dermot Mulroney - and she doesn't care who knows it. In a video shared via TikTok on Sunday, August 31, the Buffy the Vampire Slayer star, 55, confessed she is the actor's "biggest fan." "Probably since, I don't know, way before I was ever married. So I'm talking like My Best Friend's Wedding," Carpenter explained. "I just love him in that movie. He's just a good guy." The pair were both attending the GalaxyCon Nightmare Weekend in Cleveland, Ohio, and Carpenter admitted she was surprised that Mulroney, 61, was in attendance.