Sterling K. Brown (Gordon) and Chad Lindberg (Ash) are schedule to attend Supernatural convenion at Burbank, California, USA.
As was already announced, Jared Padalecki and Fredric Lehne (The Yellow Eyed Demon) are also scheduled to attend the event.
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Disclaimer: WinchesterBros.com and MediaBlvd.com are in no way connected to the event.