The 2013 documentary "I Know That Voice" featured what famous actor, known for voice roles as Cindy Lou Who and Rocky the Flying Squirrel?
I Know That Voice:  It is narrated by John DiMaggio, the voice of Bender on "Futurama" and Jake on "Adventure Time", and stars DiMaggio and many other voice actors, including Billy West, Tara Strong, Tom Kenny, Grey DeLisle, June Foray, Rachael MacFarlane, Mark Hamill, Ed Asner, Robin Atkin Downes, and Pamela Adlon.
i don't know