John Madden Director Gwyneth Paltrow Catherine Actor Anthony Hopkins Robert Actor Jake Gyllenhaal Hal Actor Hope Davis Claire Actor Gary Houston Professor Jay Barrow Actor Roshan Seth Professor Bhandari Actor Anne Wittman Joanne Actor Leland Burnett Eddy Actor Daniel Hatkoff Student Actor John Keefe Admirer Actor Haroula Rose Student Actor Colin Stinton Physicist at party Actor David Auburn Writer, Screenwriter Rebecca Miller Screenwriter John Hart Producer Jeff Sharp Producer Mark Cooper Co-Producer Robert Kessel Producer Alwin H. Kuchler Cinematographer, Cinematographer Julie Goldstein Executive Producer James D. Stern Executive Producer Bob Weinstein Executive Producer Harvey Weinstein Executive Producer Mick Audsley Film Editing Stephen Warbeck Original Music Alice Normington Production Design Keith Slote Art Director Barbara Herman-Skelding Set Decoration Jill Taylor Costume Design Kerry Barden Casting Billy Hopkins Casting Suzanne Crowley Casting