Jeremy Birnbaum is a bratty, rich, and spoiled kid who first appears in "Monster Arm". He is a karate student at Marco Diaz's dojo and regularly picks on him, despite being younger.


Jeremy is an eight-year-old boy with light skin, light brown hair, blue eyes, and brown freckles. While practicing karate, he wears a white gi with a black belt, a white headband, and red gloves. Outside of karate, Jeremy wears a light blue shirt, light green pants, and white shoes. He also wears a white sweater with light green cuffs around his neck.


Jeremy comes from a rich family and uses his immense wealth to buy fancy karate equipment and private lessons. Unlike Marco, Jeremy is a Tang Soo Do black belt. He is also not above cheating to get ahead in karate, as he brought a set of golden brass knuckles to a karate tournament in order to beat Marco. Unfortunately for him, he was found out by Sensei Brantley and disqualified for cheating along with Marco.

Despite having the support of his parents, Jeremy appears to harbor childish resentment toward his mother. Outside of karate, he regularly picks on Marco whenever they cross paths and enjoys tormenting random people on the street.


Season 1

Season 2


S1E5 Monster arm prepares to eat Jeremy
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  • Jeremy has a black belt in karate, outranking Marco's red belt, although it's possible he accomplished this through cheating or via his parents simply buying the belt for him.
  • In the show's season 1 opening sequence, Jeremy's hair is a darker shade of brown, and his headband is red instead of white. This is fixed in the season 2 opening sequence.
  • In season 1, he's one of the few people who know that Marco has a crush on Jackie Lynn Thomas.
  • While he does make fun of Marco, he becomes afraid of him when he attacks him.
  • Jeremy is similar to Brittney Wong in that both are rich and spoiled and serve as rivals to the main characters (Jeremy to Marco, and Brittney to Star).
  • "Trickstar" suggests that, deep down, Jeremy is a very miserable person; When Preston Change-O takes a small amount of joy from him, he is left utterly depressed, with Preston stating that Jeremy barely had any to begin with.


  1. Ferguson O'durguson in "Monster Arm": "That kid can't be any more than eight years old!"
  2. 2.0 2.1 Star and Marco's Guide to Mastering Every Dimension by Dominic Bisignano and Amber Benson. March 7, 2017. Published by Disney Press. ISBN: 978-1484774199.
ved Star vs. the Forces of Evil Characters
Main characters
Star ButterflyMarco DiazLudo
Characters from Earth
Diaz family:
Angie DiazLinda DiazRafael Diaz

Echo Creek Academy:
Alfonzo DolittleAndreaAwesome OpossumsBeckyBlake LemonsBrittney WongChantalChelsea McNelseyEdFerguson O'durgusonFrancis SmithingtonHope HadleyIngrid BloomgrenJackie Lynn ThomasJanna OrdoniaJustin ArmbergLars VanderdudLeahMegan GandlymMiss SkullnickMoobs SquitsonOskar GreasonPrincipal SkeevesRaya RouseySabrina BackintoshStarFan13TimmyZeke

Amy VendrosianBon BonBrigidCharlie BoothJeremy BirnbaumLove SentenceLydiaMackie HandMarisolMrs. LiaoSensei BrantleyWarriors

Characters from Mewni
Butterfly family:
Celena ButterflyComet ButterflyCrescenta ButterflyDirhhennia ButterflyEclipsa ButterflyEstrella ButterflyFestivia ButterflyJushtin ButterflyKing ButterflyQueen ButterflyRhina ButterflySkywynne ButterflySolaria Butterfly

FooldukeGlossaryckLady WhositsLil ChaunceyManfredManticoreMime GirlMina LoveberryRuberiotSir LavaboSir Scarsguard

Pony Head family:
King Pony HeadPony Head

BrianMr. CandleTom Lucitor

Forest of Unlikely Spider Bites:
King ShastacanPrincess Spiderbite

Ludo's army:
Bald eagleBeard DeerBearicornBig ChickenBoo FlyBuff FrogEmmittGiant spiderLobster ClawsMan ArmSpikeballsThree-eyed Potato BabyToffeeUnnamed bat monsterUnnamed crocodile monsterUnnamed flower monsterUnnamed frill-neck monsterUnnamed giraffe monsterUnnamed goat monsterUnnamed lizard monsterUnnamed mushroom monsterUnnamed two-headed monsterUnnamed warthog monster

Buff Frog's tadpolesDennisDogbullFlower monstersGlobgorHiggsHydraJohansen familyMewmansMillhorseRich PigeonWarnicorns

Characters from other dimensions
Magic High Commission:
HekapooLekmetOmnitraxus PrimeRhombulus

St. Olga's Reform School for Wayward Princesses:
GeminiGuardsMiss HeinousPrincess ArmsPrincess SmooshyRasticoreSt. OlgaSt. Olga's princesses

Quest Buy:
Cobalt FerreroQuest Buy sloth clerksRiddle Sphinx

Pixie clerkPixie EmpressPixie taskmasterPixies

Ben FotinoFather TimeHeliosHungry LarryJorbyKellyNachosNaysayaPreston Change-ORoySeahorseSeanSquaresTadTalon RaventalonWilloughby

Star Butterfly's creations
Butterfly monsterCloudyGiant magical squirrelsLaser puppiesMonster ArmSpider With a Top HatThree-eyed firecats