Livestreamed weekly on Twitch since 2015, Critical Role brings together a group of professional voice actors as they play through a series of elaborate Dungeons and Dragons campaigns. Originally produced by Geek & Sundry, the series garnered a large and devoted fanbase during the first campaign, allowing the cast to create their own company in 2018. Matthew Mercer heads each campaign as Dungeon Master, with a cast that includes Ashley Johnson, Travis Willingham, Laura Bailey, Liam O'Brien, Taliesin Jaffe, and Marisha Ray.