Kid vs. Kat Wiki
Millie Burtonburger
Millie Burtonburger
Full name

Millie could be short for Mildred or Millicent, or be her unabbreviated forename, unsourced

First appearance

Let The Games Begin


There you are, Mr.Kat!

Played by

Kathleen Barr

Last appearance

The Kat Went Back Part Two

Millie Burtonburger is the anti-heroic tritagonist in Kid vs. Kat. She is the daughter of Burt Burtonburger and the younger sister of Coop Burtonburger. She becomes Kat's owner and is the direct cause of the events of Kid vs. Kat. Some viewers describe her as adorable or beautiful.


Gallery-Millie-3-4 (71).png

Millie appears to love, and is always defending Kat, no matter what he does. She loves to play dress up and tea party with him, and she spoils him on a regular basis. She annoys Coop, but she does seem to appreciate when he hangs out with her, ready or forced.


References to her age in the series include:

  • According to the show, she is 8 years old and then 9 in Season 2.


Her father Burt has a lot of food-based nicknames for her which occur throughout the show which he never used for Coop:

  1. Dumpling in "The Incredible Shrinking Coop" when she promises to return after giving Kat a bath.
  2. Honey in "Don't Give Me No Static".
  3. Pumpkin in "Amazing Feet Of Strength" when at soccer game.
  4. Sugarplum in "The Incredible Shrinking Coop".
  5. Sweet Pea in "Amazing Feet Of Strength" when she does the crossword, also in "The Incredible Shrinking Coop".


  • After she loses her glasses, Millie acts like she's completely blind. However, we get a first-person shot of what things look like from her perspective without her glasses (in "Tickled Pink"), and while the shot is blurry, the shapes aren't distorted, and all of the objects have the same color. So it seems possible that she's not as blind as she acts without her glasses.
  • She is an expert liar (or at least, she's good at faking emotions and getting people to assume she's not lying). For example, in "Cookie D'uh", she framed Coop for eating all the cookies, and it's a complete shock when it's revealed at the end that she's the one who framed Coop, not Kat.
  • In "Kat to the Future Part 2", it is revealed by Burt and Coop that she had kung-fu lessons, probably before the series began since she has them in both timelines.
  • At the beginning of "Down the Drain", she Easily kicks down the bathroom door
  • She appears to have quickly learned to speak the Chinese language in 9 to 5 to Oblivion and is marketing House of Swap internationally to Peru as well
  • In the episode, "The Bottyguard", the Spybot (having memorized all Earth data) predicts that in a few years she will become smarter and taller than Coop
  • In "Never Cry Sheep", she is awarded a "5th-degree wool belt" with 13 segments by Mrs. Munson
  • In "Mind Games", she explains she learned how to skip Double Dutch (two ropes at once) and when skateboarding on a halfpipe is able to get extreme air and do many rotations on her first jump and many front flips on her second. She is then able to land in a handstand balanced on her board after doing a double back-flip and is perturbed when Coop has never see it.
  • What is described as ("Sonic Scream") in closed captions is a recurring event when she yells very loudly with different effects
    • In "Down the Drain", her crying precedes a rainstorm and may have caused it
    • In "Mind Games", it breaks Burt's glasses and a window and launches two outer doors off the house a good distance away. The house shakes enough for a cupboard to open, and a purple can and yellow box fall out.
  • Her moods influencing the weather, besides her crying in "Down the Drain", also occurs in "Mind Games" when under the frizzy-haired, after-effects of Kat's helmet.
  • She kept the powers for some time after the helmet blew up, able to move things with her mind.
    • In many cases, these things were not in her direct field of view and she reasonably could never have known their exact location, since even if she remembered seeing them before, they are mobile, like when she summons an ice cream truck and a pony, so in addition to telekinesis she must have had some form of extra-sensory perception to know where to pull them from, though it is unclear whether she is conscious of this or doing so subconsciously.
  • When she combines her sonic scream with the helmet's TK, she is able to create a mound of earth resembling a small mountain out of the ground, filled with lava that Coop nearly falls into. This also creates fissures in the surrounding earth
  • In addition to others, she was also able to levitate herself and fly
  • When Kat repairs the helmet and wears it again, the struggle versus Millie over where to put Coop has the effect of what he calls "ripping apart time and space" (and his pants)
    • Kat eventually loses this struggle, with Millie's pure mental might overpowering his machine and destroying it
  • Millie's progressive rage eventually causes a tidal wave of lava, but as soon as Coop delights her with a doll tea party, the lava is sucked back into the volcano which sinks into the ground (and the skies clear)
  • After her hairstyle is "ruined" with moisture and her powers seemingly go away (though if she were aware of them, she might have simply opted to pretend they did) and Coop explains she saved him from a volcano she asks, "What volcano?" indicating she was either unaware of causing it (and blamed the rest of the TK on the effect of a star she wished on) or else is faking unawareness to avoid blame
  • in Hair Brains, she does 48 chin-ups.
  • She is extremely strong.


Millie adopted Kat in the first episode, "Let the Games Begin", after Coop ran away from the bushes in terror from Kat and she went to investigate. After pouting and screaming, their fathers agreed to keep him. She often treats "Mr. Kat " like a doll, and dresses him up.

Most of the time, she watches little girls' TV shows, has tea parties, and plays with her favorite pet. She often gets jealous if Coop gets something that she wants. In her spare time, she is a Greenie Girl, being part of Bootsville's girl scout troop, the Greenie Girls.

Kat to the Future

In "Kat to the Future Part 2" she is the leader of the anti-Kat group, and she fights Kat for the first time shown on the show. Although initially courageous in fighting him, she quickly realizes that she loves him (or at least finds him adorable), and Kat immediately shows that he liked her, too. This may be due to his heart-shaped pupils, as the other aliens look similar but have their eyes covered by visors.


Millie is a good student at school. She is very successful in most of the subjects. In one episode, Millie brings Kat to show and tell, terrifying the students.


Millie singing in Stall That Jazz

Millie has long, bluish black hair in a ponytail, freckles, and a bucktooth. She wears a magenta-colored hairbow, red round-rimmed glasses, a green T-shirt over a dark green sleeveless knee-length dress with a white flower on it, red ankle-high socks and black Mary Jane shoes.


Millie liked Kat; even though everyone else finds him weird-looking, she is ready to break off a friendship because a 'friend' never think Kat was cute. Although she is a troublesome younger sister to Coop, she wants him and Kat to be friends, and likes to see them get along. She even believes they secretly care about each other. In the episode "Turn the Other Cheeks" when she witnessed Coop hugging and holding Kat, she said, "Aw! I knew you two really loved each other! Say cheese!" and took a picture.

Millie's most noticeable feature is when she doesn't get her way with certain things, she lets out a loud shriek, which can be heard all over Bootsville. Her father does everything she says if only to get her to stop screaming. Which has earned her the title of "master manipulator". Millie often frames Coop when she does something that would get her in trouble, most likely due to the close relationship she has with Kat. She would rather her brother get in trouble than her pet. She also doesn't like it when Coop is happy and doesn't care, or even enjoys it when he is in a tough situation.

Unlike him and her father, Millie is the only member of the Burtonburger family that Old Lady Munson actually takes a liking to. They really seem to be friends, in fact. In Down the Creek, the two of them spent the entire episode spending time together.

In the episode "Pet Peeved", Millie met a girl named Molly who seemed to be exactly the same as her. She had been disregarding Kat after meeting Molly, which caused Kat to run away and find a new owner. Devastated, she and her friend went to find Kat . Upon finding him, however, the girl didn't like Kat, because she thought he was hideous, so Millie told her off. It is unclear if she remembers her because Molly isn't mentioned in any other episode (she doesn't even appear in crowd scenes).


Millie has expressed strong affection for certain things throughout the series:


A recurring theme is Millie envisioning herself as a princess. Although sometimes it is light-hearted role-playing, in some episodes there are some dark tones to it:

  • In "Me Coop, You Kat", when she wants to be MVP like Coop and Burt calls her Most Valuable Princess, she discusses putting her dolls in a dungeon
  • in "Rhymes with Coop", when Burt builds a sandcastle at the beach, she builds an underground dungeon and talks about oppressing peasants


  • "There you are, Mr. Kat!"
  • "Isn't that right Mr. Kat."
  • "Something Smells Yummy."
  • "I decided that I'm going to call you. Mr. Kat."
  • "That's usually your department!"
  • "Some people were born for the spotlight, like me, while others are stuck holding the bag, like you."
  • "Oh Mr. Kat?"
  • " Aw! I knew you two really loved each other! Say cheese!"
  • "Mr. Kat is not evil!"
  • "Look Mrs. Munson, it's Mr. Kat and Dennis and..."
  • "Why do you want Mr. Kat new Catnip toy?"
  • "Half! You need to learn your math skills, One-Third,One-Third,One-Third, Don't you know your ratios?"
  • "I Keep telling you Mr. Kat is not an alien!"



Millie protects Kat as much as she can. Every time Kat does something evil, she immediately blames Coop. She liked him (as a pet and a member of her family), despite everything he's done, and she thinks he's adorable in his own small way.

  • Millie completely freaks out when there's even the slightest possibility of Kat disappearing and never coming back. He disappeared from the house in "Pet Peeved", "Down the Drain", "Class Act", and "The Kitty Vanishes". By "Down the Drain", when he came home at the end of the episode after she had spent with all episodes searching for him, she looked upset and slammed the door in his face, saying that was not him, however, he was covered in mud so she may not have recognized him.

In "The Kat Went Back Part 2" when Kat affirms he really is an alien, though initially flooding up with tears, she declares she doesn't care, and that it only makes him more special. Although Millie doesn't remember this, Kat would.


Millie seems to have a rivalry with Phoebe, whose disdain for her may result from the fact that she thinks Millie's a spoiled crybaby. She was seen hanging out with her as a friend at the beginning of Capture the Kat, only to suddenly swap to hatefully competing with her when they were put on opposing teams in their "Capture the Flag" game.


  • Millie was one of the people who found out about Kat being an alien.
  • Normally, in the series (and especially in Season 1), when Millie witnesses something "alien" happen, she smiles and says something that makes people think she doesn't think it's proof Kat's an alien.
    • For example, when Kat made a carrot grow to a massive size, she said, " Look, Daddy, my singing made the carrot grow! I'm singing to ALL the plants! " However, if you look at her smile, her eyebrows make it look like a fake smile, implying that she's either in intensely deep denial about Kat being an alien or has known all along and was simply covering for her beloved pet.
  • She finds out where Kat's tickle spot is in "Tickled Pink", although she never tickles Kat again after a giant robot tries to destroy her for knowing Kat's weak spot.
  • Millie thinks it's really sweet when Coop and Kat are nice to each other.
  • Millie can be a bit dumb for not seeing Kat's traps (When there are for Coop).
  • Another Canadian cartoon-Little Charmers: Hazel is also the central female of her show, also has a male pet cat who is purple, and is also called pumpkin by her father.
  • Millie can be such a crybaby, spoiled girl, and a pest, but she means well.
  • As stated in studies, Millie's shrieks would have caused deafness to the ears of the people and herself.

Fan speculation

  • Chances are, Millie's mother had black hair, as she looks nothing like her father.
  • Perhaps the reason Burt is so attached to her, is because she reminds him of her mother, who is not around. Either that, or she's adopted, but there's no indication in the show that she is.



Episodes 1-2 Episodes 3-4    
Episode 5 Episode 6 Episode 7 Episode 8
Episode 9 Episode 10 Episode 11 Episode 12
Episode 13 Episode 14 Episode 15 Episode 16
Episode 17 Episode 18 Episode 19 Episode 20
Episode 21 Episode 22 Episode 23 Episode 24
Episode 25 Episode 26 Episode 27 Episode 28
Episode 29 Episode 30 Episode 31 Episode 32
Episode 33 Episode 34 Episode 35 Episode 36
Episode 37 Episode 38 Episode 39 Episode 40
Episode 41 Episode 42 Episode 43 Episode 44
Episode 45 Episode 46 Episode 47 Episode 48
Episode 49 Episode 50 Episode 51 Episode 52
Shorts Season 1 Shorts Season 2    


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Burtonburgers Coop Burtonburger | Burt Burtonburger (Rat) | Millie Burtonburger | Grandfather Burtonburger | Grandmother Burtonburger | Aunt Beatrix
Major characters Dennis Chan | Old Lady Munson | Growler | Phoebe | Henry Chan | Lorne | Harley | Fiona | Mr. Gerber | Miss Brannigan | Foreman and Paicot
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Villains Mr. Cheeks | Kyle Dustin | Mabel | Todd Kronklin | Buck Diamond | Lloyd
Others Captain Blasteroid | Principal Dilegard | Charlene | Pet Doctor | Estelle | Molly | Phoebe's father | Dennis' Mom | Humphrey Spoolman | Harriet | Dwayne | Dizzy | Senior officer | Rookie | Neapolitan | Butterscotch
Animals Honey Fluff | Cacciatore | Bongo Boingo | Bruiser | Josephine | Black cat | Hamster Squad