"Oh god, I just dropped all these names everywhere!"
"But what about celebrity cameos, where I brought in another YouTuber, quite frankly because I know that they're gonna... help the views and make the video better?"
— TomSka, "What is the best asdfmovie joke?"
asdfmovie has had Special Guests voicing the characters ever since the early days. While some obvious examples, as well as Tom's friends like Edd Gould, were more present during the early videos, later videos upped the ante to even include media celebrities beyond YouTube.
- Recurring guests:
- Edd Gould voices the "I Like Trains" Kid, the guy who can't read in asdfmovie2, the two guys who drown in milk in asdfmovie2: deleted scenes, and Billy in asdfmovie4.
- From Jack and Dean, Dean Dobbs voices the guy doing an internet in asdfmovie4, the guy who gets beaten by his friend and the guy who punched himself in the face in asdfmovie5, the guy whose face gets punched in the face in asdfmovie6, and Joey from asdfmovie7, while Jack Howard voices the guy doing a book from asdfmovie4, and the guy who beats his friend and the guy getting hit by muffins in asdfmovie5.
- Todd Bryanton, better known as series composer LilDeuceDeuce
, is the voice of Dougal Flopguy, the Magical Pony's theme song singer, The Science Show's theme song singer in asdfmovie4, the barbershop quartet in asdfmovie6, the guy allergic to feathers in asdfmovie7, Invisible Billy Adventures' theme song singer in asdfmovie: deleted scenes, and Steven in asdfmovie9. - Jacksfilms is the voice of the Telephone Robber in asdfmovie4, the trainsgender commentator in asdfmovie10, the Genie from both asdfmovie10 and 12, the Casanova Wannabe in asdfmovie11, and the Skin-Eating Flower in asdfmovie12.
- Jamie Spicer-Lewis, also known as RageNineteen, voices the guy seeing Joey un-vore himself in asdfmovie4, Bobby in asdfmovie5, and the guy vomiting cats in asdfmovie6.
- Brock Baker voices both the skateboard cop and the guy who throws the cheese in asdfmovie4, as well as the trumpet cop in asdfmovie6.
- Robert Benfer of Klay World fame voices the "Steg-O-Saurus".
- Egoraptor voices both the mugger and the guy mugging back in asdfmovie4, as well as the guy opening a door in asdfmovie14.
- Dom Fera voices those two ducks from asdfmovie5 and the guy from asdfmovie7 asking his friend what he got for his birthday.
- From FilmCow, Jason Steele voices the Standing-Up School Teacher and everyone in the "Dog With Knife" sketch from asdfmovie6, while Chris Alex voices the horse owner and the doctor in asdfmovie13.
- Sam Lavagnino, best known as Catbug from Bravest Warriors, is the voice of Mr. Muffin. He even shouts out Bravest Warriors at the end of asdfmovie7.
- Markiplier provides the voices of the guys looking at clouds and the guy talking to the little and big babies in asdfmovie8, and David in asdfmovie9.
- From Try Hards, Eddie Bowley voices the guy asking what time it is, the lonely kid, and the guy refusing a magic trick in asdfmovie8, the guy getting hit with a letter, the intervention holder, and the birth celebrator in asdfmovie: deleted scenes, the first CGI guy in asdfmovie10, the father, the suicidal guy, the cop car stealer, the Best Sarcasm Award winner, and the 10-year old boy from asdfmovie11, the father with a camcorder, the guy who doesn't want waffles, and the exploding guy from asdfmovie12, the mother, the guy who's late, the second dog, Duck, and the guy warning about the kitten driver from asdfmovie12: deleted scenes, and the high-fivers and gun eater in asdfmovie13, while Elliot Gough voices the Killer Ball in asdfmovie10 and the orgasm countdown from asdfmovie11.
- Rebecca Parham, better known as Let Me Explain Studios, voices the "If You're Happy and You Know It" woman in asdfmovie: deleted scenes, as well as the ice cream girl and the woman who's in love with Butt in asdfmovie11.
- From Dan and Phil, Dan Howell voices the man who says, "we're all gonna die," in asdfmovie9 and the guy who gets a piece of another guy in asdfmovie10, whereas Phil Lester voices the guy pointing the gun in asdfmovie9, the guy who gives a piece of himself in asdfmovie10, and both the guy who says, "I'm gay," and the killer who'll come back later in asdfmovie13.
- Eileen Montgomery, better known as EileMonty, does the "nani?!" voice after the intro, the singing teacher, and the woman afraid of Gun Man in asdfmovie12, and the woman who's not racist in asdfmovie12: deleted scenes.
- Silas McDonnell, known online as ProBluesPlayer and the voice of Suction Cup Man, voices the arguing employee and boss from asdfmovie12 and the guy who wants to be a drink in asdfmovie14.
- ZACHxFULLER provides the voice of both Gun Man in asdfmovie12 and Steve in asdfmovie12: deleted scenes.
- asdfmovie6:
- Brendan Sussman, better known online as DukeLovesYou, voices the puncher at the start and the guy who has no idea how to breathe.
- Michael Stevens of Vsauce voices the guy who says that carrots are good for your eyesight, which is true to form for him.
- Brendan Sussman, better known online as DukeLovesYou
- asdfmovie8:
- Of all people, Kylie Minogue provides the voice of the waitress. Even Tom was surprised that he got her on board at all.
- PewDiePie is the voice of the magician.
- asdfmovie9: doddleoddle voices both the mother pregnant with Suzie and the woman who gives her baby away as food.
- asdfmovie10:
- Jacksepticeye does the voice of the man at the start who camcords a guy jumping from a building.
- Black Gryph0n voices the Beep Beep Sheep, as well as providing the lead vocals for "Beep Beep, I'm a Sheep".
- asdfmovie11:
- JaidenAnimations voices both the girl awing over a baby and the girl with a hearing aid.
- TheOdd1sOut voices both the judge and the doctor of psychology.
- asdfmovie12:
- The Completionist voices both the nerd and Johnny Bigfeet.
- Caddicarus provides the voice of the falling man who asks if people can fly.
- What is the best asdfmovie joke?: Tom Scott does the voice of the man who's disappointed at the fact that he's still alive after falling.
- asdfmovie13:
- Brian David Gilbert voices both the judge of Marshmallow Man's trial and the guy looking at the baby's "drawing".
- Stefan Johnson is the voice of both the guy in love with a fridge and the cop in the interviewing room.
- asdfmovie14:
- Ami Yamato is the voice of the girl who stole her boyfriend's arms.
- SungWon Cho is the voice of the judge who sentences the defendant to death for the crime of nothing.
