Warren Beatty John Reed Director, Actor, Writer, Producer Diane Keaton Louise Bryant Actor Jack Nicholson Eugene O'Neill Actor Maureen Stapleton Emma Goldman Actor Edward Herrmann Max Eastman Actor Jerzy Kosinski Grigory Zinoviev Actor Paul Sorvino Louis Fraina Actor Nicolas Coster Paul Trullinger Actor Ian Wolfe Mr. Partlow Actor Bessie Love Mrs. Partlow Actor MacIntyre Dixon Carl Walters Actor Pat Starr Helen Walters Actor Max Wright Floyd Dell Actor Eleanor D. Wilson Mrs. Reed Actor Peter S. Feibleman Writer Trevor Griffiths Writer Elaine May Writer Jeremy Pikser Writer Dede Allen Executive Producer, Film Editing Simon Relph Executive Producer Dave Grusin Original Music Stephen Sondheim Original Music Vittorio Storaro Cinematographer Craig McKay Film Editing Noel Davis Casting Patsy Pollock Casting Richard Sylbert Production Design Simon Holland Art Director Shirley Russell Costume Design, Casting Jeremy Zimmermann Casting