Hilary Duff has found a way to beat the heat, joining the cast of the new Polish brothers comedy "
Stay Cool."
The project, which shoots in July in Santa Clarita, Calif., is described as a "knowing-your-age comedy," centering on a successful author (Polish) who is forced to confront an unrequited high school crush (Ryder) when he returns home to deliver a commencement address to graduating seniors.