Sisters Haylie and Hilary Duffhave come a long way since their days as material girls — but they have nothing but fond memories of their early years in the spotlight.

During the Tuesday, May 20, red carpet premiere of Lifetime’s Pretty Hurts, Haylie, 40, confirmed that she provided the singing vocals for Isabella in her sister’s The Lizzie McGuire Movie that came out in 2003. Hilary, 37, reprised her titular character from the Disney Channel series of the same name and also played her Italian pop star doppelgänger. The duo sing “Hey Now (What Dreams Are Made Of)” in the film’s finale.

“Yes, I was. You mean, 20 years ago?” Haylie quipped to Entertainment Tonight of singing Isabella’s part of the song, before noting her disbelief that the siblings’ Material Girls celebrates its 20th anniversary next year. “No way!”

She added, “Maybe one day, [my daughter Ryan] will sit and watch Material Girls and get a kick out of that.”

Haylie and Hilary played sibling heiresses in 2006’s modern teen adaptation of Jane Austen’s Sense and Sensibility. In the film, Ava (Haylie) and Tanzie (Hilary) face a shocking reality when they lose their family fortune during a scandal involving their eponymous cosmetics company.

In the years since Material Girls, Haylie has transitioned her career behind the camera and directed the likes of the upcoming Pretty Hurts, while Hilary still works as an actress.