Hilary Duff by Steve Granitz/WireImage.com; Shenae Grimes by Gary Gershoff/WireImage.com Hilary Duff by Steve Granitz/WireImage.com; Shenae Grimes by Gary Gershoff/WireImage.com

Guess Hilary Duff wasn't into that whole 90210 thing after all.

Although the actress/singer had been approached to join the show's growing cast, a spokesperson for the project confirms that Shenae Grimes of Degrassi: The Next Generation has nabbed the role allegedly earmarked for Duff.

Grimes will play Brenda Walsh Annie Mills, a theater-loving teen who relocates to Beverly Hills from Kansas with her adoptive bro and their parents - one of whom will be played by Lori Loughlin.