Claire Miller is the main Antagonist in Lizzie McGuire.
Claire is a cheerleader and Kate's new best friend. Claire is a lot meaner than Kate. As shown in the Rise of the fall of the Kate empire when she kicks Lizzie and Miranda out of the bathroom and the hallway. And makes Lizzie and her friends eat on the grass Gordo was also shown to have a crush on her. Claire is sometimes hard on Kate and pressures her not to become friends with Lizzie and Miranda again. She was first seen on "Rumors" when she judged Lizzie for the cheerleading squad. Claire ran for class president in the episode "Election", but lost to Larry Tudgeman. Claire also shops with her mom, Mrs. Miller. Claire is also friends with Brooke, Gordo's former girlfriend. Claire is also in Lizzie's science class. Claire, Kate, and Larry also participated in Fact-athalon, and won. Claire is known as "Clean Tween" as shown in the episode "Dear Lizzie."
Claire is very pretty and popular, always wearing cool clothes and re-accessorizing between classes. She is also shown with hair clips and headbands.
- "Between a Rock and a Bra Place"
- "Gordo and the Girl"
- "Facts of Life"
- "Lizzie and Kate's Big Adventure"
- "Gordo's Video"
- "The Rise and Fall of the Kate Empire"
- "Working Girl"
- "Dear Lizzie"
- "The Gordo Shuffle"