Katie Ka-Boom
Katie Kaboom.jpg
Full Name Katie Ka-Boom
Segment Katie Ka-Boom
First Episode Katie Ka-Boo
Voice Actor Laura Mooney
Catchphrases I'm not overreacting, I'm a teenager!

Katie Ka-Boom is a sixteen-year-old teenage girl who greatly overreacts to trivially upsetting situations and literally turns into a comically violent and destructive monster before subsequently exploding, usually leaving the family home in ruins. She's voiced by Laura Mooney.


Being a typical teenage girl, she‘s very overreactive and emotionally difficult. When she‘s her normal self, she’s actually a very cute, beautiful, sweet and nice girl. Though when she goes "ka-boom" she turns into a destructive monster, literally. 


In human form, Katie is a teenage female. She appears to be 16-years-old and has a short blonde bob. She has a light blue shirt that somewhat hangs from her shoulders, pink pants and blue slip on shoes. She also wears pink lipstick on her lips.

Katie changing

Before she changes into a monster her eyes glow bright white, her voice gets very deep and she grows. In monster form she seems to be able to change into different forms. As one monster she looks like a green monster and her clothes are ragged, but she has also been seen as a fiery monster. More often than not, the transformation is related to the upsetting situation, such as a giant telephone monster when she loses a call, a Big Daddy Roth-esque hotrod monster during a driving lesson, and a beast in a dress for when arguing about Katie's curfew for staying out late during prom night. However, after she explodes, she’s fine and her clothes are unaffected while the rest of her family and nearby surrounding is completely ruined.

Katie doesn't seem to be aware of her exploding and turning into a monster after she has blown up, but she might just not come on it. During her transformation she will deny her families statements that she‘s a monster, saying "I'm not overreacting, I'm a teenager!".

Katie Kaboom in one monster form

Theme song

She's Katie Ka-Boom, Katie Ka-Boom.
She lives in a house with a garden in bloom.
Her family knows that anytime soon,
Their little lady Katie goes ka-boom!

List of Katie Ka-Boom cartoons

  • Katie Ka-Boo: In her first appearance, she brought her boyfriend C.B (who was really Chicken Boo) to meet her parents and her parents kept calling him a Giant Chicken, she then turned into a giant monster version of herself with wild purple hair, green skin and shredded clothes. After she notices CB is really a chicken, she turns into a hulking fiery monster, and explodes.
  • In "The Driving Lesson" she freaks out into monster form when her dad was teaching her how to drive when she thinks she knows how to drive. She subsequently shows that she can't.
  • In "Call Waiting" Katie's dad forgets to take a message from her friend, so she freaks out and exaggerates this minor mistake.
  • "Belly Button Blues" involves her mother trying to protect her, by preventing her from wearing a shirt that shows her belly button, even though everyone else does it.
  • In "The Blemish" Katie is waiting for a boy to pick her up for their study group, when her brother notices that she has a pimple, causing her to freak out.
  • In "The Broken Date" Katie turns into a monster when her boyfriend is a few minutes late for their date.
  • In "The Prom" Katie wants to stay out all night at the senior prom, but her father tries to insist on a midnight curfew, provoking her transformation into monster form.



Katie's dad and mom with little brother, Tinker.


  • Katie is a parody of The Incredible Hulk.
  • Katie made three cameo appearances in the series.
    • She appeared in one scene as a green alien looking monster in "The Big Wrap Party" when Yakko mention some characters names.
    • She (in human form) appeared in one part in the beginning of “The Scoring Session" where Katie is among one of the characters part of the orchestra. When the sub named Neivel Nosenest came, Katie wasn’t seen in the orchestra pit afterwards.
  • Nicholas Hollander based Katie on his own teenage stepdaughter who would often explode at every little thing that went wrong.
  • A lookalike of Katie Ka-Boom appeared in the series finale of The Sylvester and Tweety Mysteries.

The Katie Ka-Boom lookalike in The Sylvester and Tweety Mysteries

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