There are nine recurrent characters in ''[=LazyTown=]'', all but three of them played by puppets. In addition to the main actors listed below, many different actors have played the characters (including the ones normally portrayed by puppets in the television series) in the various ''[=LazyTown=]'' live productions.

!!Stephanie ( Julianna Rose Mauriello (seasons 12) / Chloe Lang (season 34) )
[[caption-width-right:300: Left - original Stephanie (Julianna Rose Mauriello). Right - current Stephanie (Chloe Lang).]]
* BlitheSpirit
* {{Catchphrase}}: "There's always a way!"
* CheerfulChild
* HairDecorations: She wears a pink headband in her pink hair.
* NaiveEverygirl
* NotAllowedToGrowUp
* OnlyOneName
* PinkGirlBlueBoy: With Sportacus.
* PinkMeansFeminine: She has pink hair, wears a pink headband, and all her clothes are pink.
* PluckyGirl
* RoseHairedSweetie
* TokenHuman: Stephanie is the only human child, and the only female human, even though her uncle and every other townsperson is a puppet.
* TomboyAndGirlyGirl: The Girly Girl to Trixie's Tomboy

!!Sportacus ( Magnús Scheving (Seasons 1-4) / Dyri Kristjansson (Since January 2014) )
[[caption-width-right:300:Left - original Sportacus (Magnús Scheving). Right - current Sportacus (Dyri Kristjansson).]]
* {{Adorkable}}: While Sportacus is conventionally attractive, well-muscled and very fitness-oriented, many fans consider him adorkable due to his constant optimism, boyish over-excitement, hopeless naiveté and awkward English. His baby-blue eyes and cheesy grin only help the matter.
* AmbiguouslyHuman: He is faster and more agile than any of the human characters and can pull off stunts that most people could only dream of. He also [[OurElvesAreBetter keeps his ears conspicuously hidden under his hat at all times]].
* BadassMustache: A very long and straightened Creator/SalvadorDali type that normally would be worn by a villainous character.
* BlitheSpirit: Alongside Stephanie, Sportacus inspires the previously lethargic inhabitants of Lazy Town to become more active and exercise more.
* TheCastShowoff: Sportacus showcases Scheving's amazing stunts and talent as a gymnast, to the point where the character won't simply ''walk'' anywhere - instead he'll flip, somersault, walk on his hands, cartwheel, etc. just to get to wherever he needs to be. Granted, the show was created by Scheving himself, but still...
* {{Catchphrase}}: "Someone's in trouble!"
* ChestInsignia: Sportacus' "10".
* HyperspaceArsenal: His backpack can transform into gyrocopter and contains far more bats, rackets, balls and other sports equipment than should be able to fit into it.
* InnocentBlueEyes: He has very blue eyes and a very optimistic and almost childlike enthusiasm for being active.
* InvincibleHero: Played with - Sportacus is very capable but in keeping with the show's promotion of friendship and teamwork often needs the help of Stephanie and the other children to foil Robbie's latest scheme.
* KryptoniteFactor: Sportacus' is sugar; eating any sugary food renders him immediately comatose, and fresh fruit (which contain quite a bit of sugar.) or vegetables (a classification that includes a handful of "sugary" foods, most prominently the sugar beet) are required to restore him. This has been justified by his weakness being specific to ''refined'' sugar rather than the natural sugars present in fruit and vegetables.
* LightningBruiser: Although since the show is aimed at pre-teens he never actually engages in violence barring some very slapstick style fights played for laughs in the "Pirate" and "Knight" episodes.
* MrFanservice: Scheving is a very fit and handsome man and even in the Sportacus costume and comedy moustache still looks good. Dyri is also a pretty handsome chap in a different way and is also extremely fit, continuing this trope.
* MundaneMadeAwesome: No matter the task at hand, Sportacus will make sure he does it involving at least a few backflips, twirls, and heroic poses... Even walking down the street.
* OnlyOneName: Like most superheroes, Sportacus goes by a mononym.
* PinkGirlBlueBoy: With Stephanie.
* SelfDeprecation: Describes himself as a "slightly above-average hero" when he first meets Stephanie.
* SuperStrength: Sportacus rarely uses it but he's superhumanly strong - in the season four episode "Mystery of the Pyramid" he lifts the entire pyramid several feet off the ground to dislodge a boulder blocking the door using nothing more than a rope and grapnel.
* WeaksauceWeakness: He is crippled by eating chocolate or refined sugar, but can regain power by eating healthy foods.

!!Robbie Rotten (Stefán Karl Stefánsson)
* AlliterativeName
* AmbiguouslyGay: Despite claiming to hate Sportacus and wanting him to leave the town, Robbie sure spends a lot of time talking about Sportacus, touching Sportacus and jumping into his arms whenever the slightly-above-average hero shows up.
* AntiRoleModel: Although a rather flawed one, considering that he wants the children of the town to be lazy and in bad shape, supposedly like himsef, despite Robbie isn't neither lazy nor in bad shape.
* BadIsGoodAndGoodIsBad: Played with. Robbie sometimes seems to genuinely believe that his bad views on health and exercise are the right ones, but he also has some awareness of the evil nature of his actions.
* BigBad
* BigOlEyebrows[=/=]EvilEyebrows
* BrilliantButLazy: Robbie is the epitome of this trope. He prides himself in being lazy, and even schemes to make the rest of the town as lazy as he is, yet he is easily the most brilliant person in the entire town and is able to create ''anything'' out of ''anything''. Ironic, seeing that due to Robbie's constant attempts to make Lazy Town lazy via elaborate traps, machines, and costumes, he becomes one of the most active residents.
* CampStraight: Although, assuming he is AmbiguouslyGay, he might as well count as a CampGay.
* {{Catchphrase}}: "I meant to do that!"
* TheChewToy: Has a rather bad luck.
* CreepyCrossdresser: As Miss Roberta.
* DastardlyWhiplash: Lacks the moustache and top hat, but otherwise features the crooked mannerisms, fancy suit and overt meanness which are representative of the character.
* EvilLaugh: He is certainly capable of one, heard most clearly in songs like "You Are a Pirate."
* ExcessiveEvilEyeshadow
* FriendlyEnemy: Even though he's the villain, it's clear that the other characters see him as a friend, and deep down, the feeling is mutual.
* GadgeteerGenius
* GeniusBruiser: Downplayed due to the show's nature, but Robbie is evidently very physically fit, and in some instances he proves to be almost as athletic as Sportacus (albeit not so spectacularly so, of course).
* GrayEyes
* HarmlessVillain
* IneffectualSympatheticVillain
* LaboriousLaziness: He prides himself on being lazy, and schemes to make the rest of the town as lazy as he is, but these very schemes make him a more active resident than any other, including Sportacus.
* LanternJawOfJustice: Averted, as he's the villain.
* LaughablyEvil
* MasterOfDisguise: He's even got a song about it!
* MrFanservice: Robbie is very much a YMMV example, but Stefan Karl when not wearing the exaggerated prosthetics is a ruggedly handsome man.
* NamesToRunAwayFromReallyFast
* NotEvilJustMisunderstood
* PaperThinDisguise: Sometimes.
* {{Schemer}}
* SillyWalk

!!Mayor Milford Meanswell
* {{Adorkable}}
* AlliterativeName
* CloudCuckooLander: He seems zoned-out regularly.
* MeaningfulName: He means well.
* PermanentElectedOfficial
* ShoePhone: His shoe doubles as a phone in ''Secret Agent Zero''.

!!Ms. Bessie Busybody
* AlliterativeName
* TheFashionista
* TheWorkaholic
* YouGottaHaveBlueHair

* AdorablyPrecociousChild
* AttentionDeficitOohShiny
* BigEater
* HairOfGoldHeartOfGold
* {{Keet}}
* KidAppealCharacter
* OnlyOneName
* SweetTooth: His entire character is based on his sweet tooth.
* TagalongKid

* BlackAndNerdy
* BrilliantButLazy: He spends most of his time sitting in front of a screen, but he's very smart.
* ChildProdigy
* GadgeteerGenius
* HomemadeInventions: All of his inventions.
* MeaningfulName
* OnlyOneName
* TheSmartGuy
* WeekendInventor

* DeadpanSnarker
* MeaningfulName
* OnlyOneName
* ThePrankster: She can be a troublemaker and likes to draw mustaches on Mayor Meanswell's posters.
* TomboyAndGirlyGirl: The Tomboy to Stephanie's Girly Girl
* TwoferTokenMinority

* {{Catchphrase}}: "It's mine!"
* HarmlessVillain
* ItsAllAboutMe
* JerkWithAHeartOfGold: Yeah, he's a spoiled brat, but he's not a supervillain.
* MeaningfulName[=/=]ExactlyWhatItSaysOnTheTin
* NeatFreak: Comes from his namesake nature. Came in handy in "Trash Trouble", when he kickstarts the kids' cleaning of LazyTown.
* OnlyOneName
* RichInDollarsPoorInSense
* TheScrooge
* SpoiledBrat