Hilary Duff Stays Cool

Hilary Duff has joined the cast of the new Polish brothers comedy, Stay Cool, along with Winona Ryder, Sean Astin, Chevy Chase and Jon Cryer.

The “knowing-your-age comedy” centers on a successful author (Mark Polish) who is forced to confront an unrequited high school crush (Ryder) when he returns home to deliver a commencement address to graduating seniors.

According to The Hollywood Reporter, Duff, 21, will portray Shasta O’Neil, a sexy high school senior who flirts with the visiting author and invites him to the prom.

Stay Cool shoots next month in Santa Clarita, Calif.