|“||Does anybody wanna play jacks after dinner?||„|
She is voiced by Kath Soucie.
In "Supper Villain", before she became a villain, she used to be friends with The Powerpuff Girls. Julie invited The Powerpuff Girls to come and play jacks at her house, much to the silent annoyance of Harold. When The Utonium Family came to The Smith House for dinner, Julie did nothing more than keep constantly asking if anybody wanted to play jacks after dinner. When Harold revealed his villainous self and fought with The Powerpuff Girls and even tried to melt The Professor's head, Julie didn't seem to understand the magnitude of the situation and just sat around, happily asking if anybody wanted to play jacks with her. Eventually, the tension-filled dinner broke out into a food fight and Julie got pied in the face. Harold was arrested and Julie stayed at home with her family.
In "Just Desserts", Marianne told Harold that she shared the same hatred for The Powerpuff Girls as he did, after they so rudely ruined her dinner. Just then Julie came in, crying and saying that The Powerpuff Girls lost her jacks, during their last play date and now she really hated them. She joined their team of hatred and Bud did too, because as he said "he hated everything". Julie joined her family in breaking into The Utonium House, while the family was away and wrecking everything in sight. Later, she joined her family in driving the minivan through the walls and destroying the house even more, and even attempting to kill The Powerpuff Girls and Professor Utonium. The Powerpuff Girls were finally able to defeat The Smith Family and lock them all behind bars.
Julie is a delightful little girl, about the same age as The Powerpuff Girls. She really enjoyed playing with jacks and like children her age, she throws temper tantrums, and holds grudges over petty things, like her friends losing her toys. She is a bit of an idiot, as she doesn't seem to understand anything around her, nor can she read social cues. In intense life-or-death situations, for example, Julie will happily sit around and repeatedly ask off-topic questions, relating to playing jacks.