After the end of the Second World War, Preiss returned to the theatre, and from 1949 worked extensively dubbing films into German.
Preiss appeared in such productions as The Longest Day (1962), Otto Preminger's The Cardinal (1963), and with Jean-Paul Belmondo in Is Paris Burning?
He starred alongside Burt Lancaster in John Frankenheimer's The Train (1964), Frank Sinatra in Von Ryan's Express (1965), Robert Mitchum in Anzio (1968), with Richard Burton, in the title role of Erwin Rommel in Raid on Rommel (1971), and The Boys From Brazil (1978) with Gregory Peck.
Preiss played Field Marshal von Rundstedt in Richard Attenborough's all-star war epic A Bridge Too Far (1977).
In film dubbing, Preiss provided the voice for such actors as Lex Barker, Christopher Lee, Anthony Quinn, Claude Rains, Richard Widmark and Conrad Veidt as "Major Strasser" in the 1975 remastered version of Casablanca.