Jackie Lynn Thomas is a recurring character in Star vs. the Forces of Evil. She is a student who attends Echo Creek Academy, the same school Star Butterfly and Marco Diaz go to. Marco has a crush on her since kindergarten and later becomes his girlfriend.
Jackie has blond hair with a streak of aqua blue, aqua eyes, and freckles. Her signature outfit is a green and white shirt, a golden seashell necklace, cyan shorts, green and white kneesocks, and blue and white shoes.
Jackie is a laidback girl who is shown to enjoy and have a talent for skateboarding. She is shown to like weird things, especially when Marco had a Monster Arm.