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Patton Oswalt, actor/comedian
Patton Oswalt may be "Downton's" No. 1 famous fan. He hilariously live-tweets each episode each week. Examples include: "Oh, how god**** adorable is Matthew in his hunting cap? #notgay #wellmaybe #DowntonPBS"; "I can't Tweet this enough: I love Maggie Smith. #DowntonPBS"; "Ouija board! This was the closest thing to Twitter at Downton. #DowntonPBS"; "Maggie Smith refuses sauce like a GANGSTA! #DowntonPBS"