The film is released on December 25, 2015 in IMAX 3D, Digital 3D and RealD 3D.
- Finn - Jeremy Shada
- Jake - John DiMaggio
- Princess Bubblegum - Hyden Walch
- Marceline - Olivia Olson
- Ice King - Tom Kenny
- Lumpy Space Princess, Banana Guards - Pendleton Ward
- Flame Princess - Jessica DiCicco
- Lady Rainicorn, BMO - Niki Yang
- Fionna - Madeline Martin
- Cake - Roz Ryan
- Prince Gumball - Neil Patrick Harris
- Marshall Lee - Adam Sandler
- Jake Jr - Kristen Schaal
- Older Finn - Roger Craig Smith
- Hunson Abadeer - Martin Olson
- Breakfast Princess - Grey DeLisle
- Solar Princess, Charlie - Tara Strong
- Lemonhope - Justin Roiland
- Betty Grof - Lena Dunham
- Martin Mertens - Stephen Root
- T.V. - Dan Mintz
- Abracadaniel - Steve Little
- Evil Witch - Nicki Minaj
- Toby Turner - Nerbville
List of CameosEdit
- Clarence as a toy.
- Darwin is seen on the aquarium.
- Grim Reaper as a skeleton pirate captain.
- Daffy Duck as a skeleton pirate.
- Anderous from The Amazing World of Gumball: The Movie as one of the gargoyles.
International Release DatesEdit
- In the Pirate Ship scene, A skeleton that looks like Grim Reaper from The Grim Adventures of Billy & Mandy (1993) with a beard and pirate gear.
- Adventure Time theme song (movie version).
- My dream - Performed by Jeremy Shada.
- Cupcake Goober - Performed by Steve Little.
- I Am the Bad Guy - Performed by Tom Kenny.
- You're a Girl - Performed by John DiMaggio.
On October 12, 2017, A sequel titled Adventure Time 2.