Los Angeles, California - Kendall and Kylie Jenner tapped into some early-aughts nostalgia with their joint Lizzie McGuire-inspired Halloween costumes.

This is what dreams are made of!

The sisters debuted their 'fits on Thursday, with Kendall playing Lizzie and Kylie starring as her look-alike counterpart, Isabella, from the 2003 movie.

In a viral TikTok, the reality stars recreated the iconic ending scene, where the pair sing This Is What Dreams Are Made Of.

Kendall Jenner Kendall Jenner gets nostalgic over her blonde era with never-before-seen pics

But that wasn't all, as Kylie also treated fans to a clip of herself and the 28-year-old model showing off their looks to a sound featuring Mean Girls' famous explanation of Halloween in "girl world."

The Disney Channel looks weren't either Jenner's only costume this year, of course, as Kylie made waves earlier in the week with homages to Jane Fonda in Barbarella and Demi Moore in Striptease.

As for Kendall, the 818 Tequila mogul teamed up with longtime BFF Hailey Bieber to dress up as Paris Hilton and Nicole Richie in their reality show The Simple Life – also from the early 2000s.

Looks like Kendall's making the most of her new look as a blonde!