20 Celebrities You Didn't Know Appeared In Rick And Morty

Almost instantly after Dan Harmon's Rick & Morty premiered in 2013, it was hailed as one of the most promising shows on television. Rarely had anyone seen a cartoon, or any series for that matter, that could match Rick & Morty's delightful wit, hilarious dialogue, deranged humour, mindbogglingly inventive stories, and outrageous characters.

Because most of the characters are weird and surreal, your brain rarely considers who's playing them. When you're watching a story revolving around sentient amoebas, masturbating cats, or slut dragons, you're probably not focusing on the actors.

However, the Emmy-award-winning show has one of the most incredible casts in animation. When it was clear Rick & Morty was something truly special, every celebrity under the sun wanted to appear in some capacity, even if they were playing a pencil. (That's not an exaggeration. One celebrity literally played a pencil.) Whether or not you have realised it, mega-stars like Sam Neill, Susan Sarandon, and Paul Giamatti have lended their acting talents to the show.

You may have recognised a few voices in Rick & Morty but you certainly didn't clock all of them.

First Appeared In Season 2 Episode 6 - The Ricks Must Be Crazy

After the battery of Rick's ship malfunctions, he and Morty decide to fix it by shrinking to microscopic size and entering it. While inside the battery, Morty learns it's powered by the denizens of a micro-universe. At least, it was. After one of the citizens, a scientist called Zeep, learns how to sustain their world with his own mini-universe, the people stopped powering the battery.

Even though Zeep is quite a memorable character, few viewers realised he was voiced by tv show host, Stephen Colbert. Colbert doesn't disguise his voice in any way but most viewers still didn't recognise him since they weren't use to hearing him speaking in such an arrogant and self-loathing manner.