Lindsay Lohan was in the running for the role of Lizzie McGuire.
While Hilary Duff eventually nabbed the series's title role, she admits to having bombed her first audition for the show.
Hilary Duff credits her quirky personal style for helping her stand out during auditions and, ultimately, land the role.
Underwhelmed by Hilary Duff’s performance in the Lizzie McGuire pilot, Disney Channel executives insisted the show hire an acting coach for her.
Before settling on animated asides to reveal what's happening in Lizzie's mind, the show's producers considered voiceover and Pop Up Video-style text.
Lizzie McGuire's distinct visual style was partially inspired by the German action thriller Run Lola Run.
The show was originally supposed to focus on Lizzie's relationship with her mother, not her friendship with Gordo and Miranda.
The now-iconic episode "Between a Rock and a Bra Place," where Lizzie and Miranda shop for their first bras, almost didn't happen.
Ethan Craft wasn't originally intended to be Lizzie's crush.
In fact, Ethan Craft was supposed to be a more stereotypical bully-jock.
Hilary Duff did all of her own stunts.
Hilary Duff's Lizzie McGuire soundtrack single "I Can't Wait" was actually a cover — the song was originally recorded by Australian singer Brooke McClymont.
After the success of The Lizzie McGuire Movie, there was talk of a sequel and a second series about Lizzie's life, but Disney and Hilary Duff couldn't come to an agreement about money.
The second Lizzie series would've been an ABC primetime show about Lizzie, Miranda, and Gordo's high school years.
After the Lizzie-centric spin-off fell apart, Disney tried to move forward with a show about Miranda's family called Stevie Sanchez.