Julie has her mom and dad, who adopted her, as well as an unknown sibling in her family. It was also mentioned that she has a grandfather in "I Can Be a Firefighter!". In addition, she has a dog named Scooter, whom she adopted from Min. Before Scooter, she had a cat who ran away. According to "The Alphabet Zoo", Julie has an aunt named Molly who travels all over the world (especially Australia) and tells stories. Julie Into In Kaylee Heis According Barney Live! In New York City Holds Put A Make-Up On. Julie also plays the piccolo, as seen in Barney Live! In New York City and "Who's Who on the Choo Choo?"
- Honk! Honk! A Goose on the Loose! (first appearance)
- Picture This!
- Look at Me, I'm 3!
- The Alphabet Zoo
- Barney Live! In New York City (Susannah Wetzel)
- Barney Live! In New York City (Susannah Williams)
- If the Shoe Fits...
- I Can Be a Firefighter!
- Shopping for a Surprise!
- Twice Is Nice!
- A Welcome Home
- Our Furry Feathered Fishy Friends
- Gone Fishing!
- Camera Safari
- Who's Who on the Choo Choo?
- Up We Go! (final appearance)
- in Barney's Fun & Games, she was replaced by Kristen played by Sara Hickman.