Angela Winkler as Katharina Blum

Mario Adorf as Kommissar Beizmenne

Dieter Laser as Werner Tötges

Jürgen Prochnow as Ludwig Götten

Heinz Bennent as Dr. Blorna, Anwalt

Hannelore Hoger as Trude Blorna

Rolf Becker as Staatsanwalt Hach

Harald Kuhlmann as Moeding, Polizist

Herbert Fux as Weninger, Journalist „Die Zeitung“

Regine Lutz as Else Woltersheim, Patentante Katharinas

Werner Eichhorn as Konrad Beiters

Karl-Heinz Vosgerau as Alois Sträubleder, Unternehmer

Angelika Hillebrecht as Frau Pletzer

Horatius Häberle as Staatsanwalt Dr. Korten

Achim Strietzel as Lüding, Konzernherr

Peter Franke as Dr. Heinen

Walter Gontermann as Pater Urbanus

Henry van Lyck as "Scheich" Karl

Josephine Gierens as Herta Scheumel

Stephanie Thoennessen as Claudia Stern

Hildegard Linden as Hedwig Plotten

Bernd Nesselhut as Georg (uncredited)

Margarethe von Trotta as (uncredited)

Olivia Wredenhage as Anna (uncredited)