After two successful seasons on Disney Channel, plus a theatrically released movie, Lizzie McGuire ended in 2004. Portraying the title character made Hilary Duff a star and even led to a singing career outside of her acting. What made the Disney series such a hit was that Lizzie McGuire's progression into young adulthood was relatable. She had an obnoxious younger brother named Matt whom she loved and hated at the same time, and she had ups and downs with her best friends as they matured. In the early 2000s, there was no show like Lizzie McGuire on TV.

https://screenrant.com/lizzie-mcguire-ended-canceled-after-season-2-reason/