Cookies help us deliver our Services. By using our Services, you agree to our use of cookies. Learn More.

The Small Role Hillary Duff's Sister Had In Lizzie McGuire

Whether you're talking about a teenage coming-of-age drama, a romantic comedy, or any other form of entertainment that you want young, impressionable women to pay attention to, there's a formula that entertainment producers love to follow. And that formula is: take a pretty (but not too pretty) girl, make her clumsy, awkward, and/or shy, and give her dreams to aspire to be something more than a pumpkin-spiced-latte loving, scrapbooking, shoe-shopping Basic Betty. If you were born in the late 80s or early 90s (and if your parents were rich enough to add the Disney channel to your cable package), Lizzie McGuire, played by Hilary Duff, fit that bill pretty well. For two seasons and a movie, she was that role model for young girls and tweenagers to look up to while also navigating the challenges of middle/high school, friends, enemies, frenemies, and romance.

Don't feel bad if you fell for this formula. Lots of us did. Heck, some of us still belt out the lyrics to "Fight Song" or "Come Clean" when we're driving alone and it comes on the radio. If you and your wine club friends have been a little extra stressed lately, then re-watching "The Lizzie McGuire Movie" on a weekend while passing around the merlot might just be the guilty pleasure you need to indulge in. That being said, even the biggest "Lizzie McGuire" fans might not know that Hillary Duff's little sister played a sneaky role in her film debut.

She was the secret singing voice of Isabella

According to Bustle, who was one of the first entertainment news outlets to spill the beans back in 2017, Hilary Duff's sister Haylie had a special cameo in the "Lizzie McGuire" movie, but it's not what you might think. She never appeared on screen herself, but she did make her presence known. During the scenes where Hilary played both herself and Isabella, whenever the two ("two") would sing together, Hilary was in fact not vocalizing for both versions of herself. It was Haylie who lent her pipes for Isabella. 

When you think about it, this move makes sense. We're no sound engineers, but it seems like having one person's voice doubled for the same song would make it hard to sound like two different (yet physically identical) people were singing at the same time. And Haylie wasn't just chosen because she happened to be the sister of a famous singer/actor. She actually had (and still has) the talent to fill the role. The Bustle piece mentioned earlier outlines her many vocal accomplishments, including a recorded duet with Seth McFarlane. These days, however, she prefers to live a pretty low-key life. Instead of singing and acting, she now runs a blog called The Real Girl's Kitchen and also designs for and manages her own clothing company called The Little Moon Society.