Hans Peter Hallwachs, son of a veterinarian, attended the acting school "Der Kreis" (Fritz Kirchhoff School) in Berlin from 1959 to 1961 after graduating from high school in Plön and dropping out of law study.
Hallwachs was one of the busiest character actors on German television and played supporting roles in many "Tatort" thrillers.
He made his stage debut as Pater in Max Frisch's Andorra.
He was a German actor, voice actor and radio play speaker/actor.
Since the late 1960s he has also made a name for himself as a character actor in film and television.