Ashton Kutcher Walden Schmidt Actor Jon Cryer Alan Harper Actor Conchata Ferrell Berta Actor Amber Tamblyn Jenny Actor Courtney Thorne-Smith Lyndsey Mackelroy Guest Star Jennifer Aspen Stephanie Guest Star Molly Stanton Michaela Guest Star Nicole Travolta Heidi Guest Star Tara Perry Sarah Guest Star Tom Schwartz Italian Exchange Student Guest Star Chuck Lorre Executive Producer, Writer Don Reo Executive Producer, Writer Jim Patterson Executive Producer, Writer Susan McMartin Writer Steve Tompkins Writer James Widdoes Director