Jeremy ShadaFinn the Human (voice) John DiMaggioJake the Dog (voice) Tom KennyIce King (voice) Hynden WalchPrincess Bubblegum (voice) Olivia OlsonMarceline the Vampire Queen (voice) Niki YangBMO / Lady Rainicorn (voice) / Författare Pendleton WardLumpy Space Princess (voice) / Författare / Exekutiv producent / Theme Song Performance Polly Lou LivingstonTree Trunks (voice) Ava AcresYoung Marceline (voice) Justin RoilandEarl of Lemongrab (voice) Kumail NanjianiPrismo (voice) Ashly BurchBreezy (voice) / Berättelse Madeleine MartinFionna (voice) Kristen SchaalJake Jr (voice) Isabella AcresYoung Princess Bubblegum (voice) 'Weird Al' YankovicBanana Man (voice) Andy MilonakisNeptr (voice) Andy SambergParty Pat / Rap Bear (voice) Neil Patrick HarrisPrince Gumball (voice) Mark HamillDark Magician (voice) M. Emmet WalshCosmic Owl (voice) Kevin Michael RichardsonAdditional Voices (voice) Lou FerrignoBilly (voice) Kent OsborneBounce House Princess (voice) / Storyboard Henry RollinsBob Rainicorn (voice) Steve LittleAbracadaniel (voice) / Författare Lauren LapkusPatience St. Pim (voice) Kyla KowalewskiMe-Mow (voice) James UrbaniakRat King / Leaf Beard (voice) George TakeiRicardio (voice) Thurop Van OrmanKent (voice) / Författare / Supervising Producer Donald GloverMarshall Lee (voice) Grey DeLisleIce Queen (voice) Ako CastueraCanyon (voice) / Författare Laura SilvermanEthel Rainicorn (voice) John HodgmanElder Plops (voice) Kate MicucciChips (voice) Riki LindhomeIce Cream (voice) Sharon HorganMinerva (voice) Jenny SlateHuntress Wizard (voice) Jackie BuscarinoSusan Strong / Kara / Additional Voices (voice) Keith DavidFlame King (voice) Dee Bradley BakerAdditional Voices (voice) Maurice LaMarcheWizard Police (voice) Alan TudykChatsberry (voice) Cole SanchezAdditional Voices (voice) / Regisör / Storyboard Livvy StubenrauchBonnibel (voice) Paul ReubensGnome Ruler/Dancing Bug (voice) Billy WestGoose / Erik Adamkinson / Mayor (voice) Brian Doyle-MurrayPrince Huge (voice) Alan OppenheimerDarren the Ancient Sleeper/Sun (voice) Beau BillingsleaThe Moon (voice) Eric BauzaButtersotch Butler (voice) Sean GiambroneShermy (voice) Brian BaumgartnerGeorgy / Private (voice) Toby HussBooboo / Commander (voice) David FergusonLifeguard (voice) / Regisör / Författare / Animation Hannibal BuressFlame Prince (voice) Crispin FreemanTurtle Prince (voice) Peter SerafinowiczLumpy Space Prince (voice) Elle NewlandsButterscotch Butler (voice) Matthew BroderickDream Warrior (voice) Bert YounLee (voice) / Författare Donald FaisonPrincess Cookie (voice) Kay LenzBird Woman (voice) Maria BamfordManfried / Chocoberry / Candy Corn Girl (voice) Mark ProkschJohnnie (voice) Marc MaronSquirrel (voice) LeVar BurtonBubble (voice) Melissa VillaseñorClerk (voice) Lucy LawlessGeneral Tarsal (voice) Alia ShawkatBetsy (voice) Chelsea PerettiQueen of Ooo (voice) Paul ScheerToronto (voice) Dave FoleyWarren Ampersand (voice) James BaxterJames Baxter (voice) / Animation J.G. QuintelBlue Jay (voice) John Moschitta Jr.Key-per (voice) Sam MarinGareth / Flying Lettuce Brother (voice) Collin DeanTiffany (voice) Martin OlsonHunson Abadeer (voice) Pamela AdlonGunther (voice) Creed BrattonPhlannel Boxingday (voice) Open Mike EagleGingerbread Rapper / Rapper Chipmunk (voice) Stephen RootMartin (voice) Laraine NewmanWidow / Additional Voices (voice) Lennon ParhamAdditional Voices (voice) Steve WolfhardSlimy D (voice) Davey JohnsonXergiok (voice) Zach KingFizzbang (voice) Adam MutoRegisör / Författare Kirsten LeporeRegisör / Författare Masaaki YuasaRegisör / Författare David FergusonLifeguard (voice) / Regisör / Författare / Animation Patrick McHaleRegisör / Författare Cole SanchezAdditional Voices (voice) / Regisör / Storyboard Pendleton WardLumpy Space Princess (voice) / Författare / Exekutiv producent / Theme Song Performance Niki YangBMO / Lady Rainicorn (voice) / Författare Somvilay XayaphoneFörfattare Thurop Van OrmanKent (voice) / Författare / Supervising Producer Ako CastueraCanyon (voice) / Författare Merriwether WilliamsFörfattare Steve LittleAbracadaniel (voice) / Författare Luther McLaurinFörfattare Bert YounLee (voice) / Författare Curtis LelashExekutiv producent Brian A. MillerExekutiv producent Fred SeibertExekutiv producent Rob SorcherExekutiv producent Jennifer PelphreyExekutiv producent Nick JenningsArt Direction Parzival RothleinAnimation Manager James BaxterJames Baxter (voice) / Animation Gary KachelhofferAnimation Tobias von BurkersrodaAnimation Kent OsborneBounce House Princess (voice) / Storyboard Ashly BurchBreezy (voice) / Berättelse 
