Sorry to tell you but it's a sec. The R in Riggs is a dead giveaway
Favorite Successes: Walking Dead Cast(IP), Veronica Roth(IP), Rick Riordan(IP), All-American Rejects(IP), X-Men Days of Future Past Cast, Orphan Black Cast TTM Successes: James and Oliver Phelps, Matthew Lewis, Michael C. Hall, Willem Dafoe, Neil Patrick Harris, Daniel Radcliffe, Toni Collette, Rupert Grint, Miles Teller, Jake Gyllenhaal
I don't judge Chandler for having a ghost writer. He's still a kid and he would be extremely busy catching up in school and attending TWD events. Your best bet to get an official signature is to meet him at a con or another similar event.
TTM Successes: Ian Mckellen, James Earl Jones, Quentin Blake, Andrew Lincoln, Aaron Eckhart, Cate Blanchett, David Morrissey, Jeremy Bulloch, Richard Armitage, Nicholas Hoult, Mark Hamill, Craig McLachlan, Jason Alexander, Julian Glover, Jai Courtney, Anson Mount. IP Successes: Aidan Turner, Alex Saviuk, Stan Lee, Manu Bennett, Olivia Olson, Robin Hobb, Tony Moore, Arthur Suydam, Robin Lord Taylor, Christopher Lloyd, Jessica Diccico, Nathan Fillion, John Dimaggio, Billy West, Graham Mctavish, Tom Taylor, Christopher Heyerdahl, Clive Standen, Geoffrey Rush, Travis Fimmel, Brianna Hildebrand, Stefan Kapicic, Troy Baker, Sean Astin, Benedict Samuel, Charles Martinet, Katee Sackhoff, Karl Urban, Ken Lashley.
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TWD is an awesome show 
