Jon Cryer Alan Harper Actor Ashton Kutcher Walden Schmidt Actor Conchata Ferrell Berta Actor Edan Alexander Louis Actor Ryan Stiles Dr. Herb Melnick Guest Star Courtney Thorne-Smith Lyndsey Mackelroy Guest Star Deanna Russo Laurel Guest Star Rose Matheu Lily Guest Star Katie Cleary Katherine Guest Star Chuck Lorre Executive Producer Don Reo Executive Producer, Writer Jim Patterson Executive Producer, Writer Tim Kelleher Writer Saladin K. Patterson Writer Matt Ross Writer Max Searle Writer James Widdoes Director