The Simpson sisters are embarking on a new project together: a fashion line. Jessica Simpson is teaming up with little sis Ashlee to create a new clothing line aimed at tweens.

According to WWD (via PEOPLE), the new line will be part of the Jessica Simpson Collection and will feature sportswear and activewear with a "girly, playful attitude," something that will fit in perfectly with the tween set.

Both Jessica and Ashlee will serve as co-directors of the line.

"Creating a tween apparel collection was a natural extension for the brand," Jessica told WWD. "I'm excited to bring my sister, Ashlee, along as co-creative director of this division, because she brings a savvy rocker edge that defines today's tweens."