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. June Foray: June Foray (born June Lucille Forer; September 18, 1917 – July 26, 2017) was an American voice actress who was best known as the voice of such animated characters as Rocky the Flying Squirrel, Lucifer from Disney's "Cinderella", Cindy Lou Who, Jokey Smurf, Granny from the Warner Bros. cartoons directed by Friz Freleng, Grammi Gummi from "Disney's Adventures of the Gummi Bears" series, and Magica De Spell, among many others.
June Foray