After some acting jobs, he was contacted by a representative of the Rank Organisation who was looking for a dubbing voice for Stewart Granger.
His sonorous voice impressed the British film executives and in 1946 he received his first voice-acting assignment for Madonna of the Seven Moons (1945).
[2] Although he appeared in a number of film and TV productions over the decades, beginning in 1948 and ending in 1989 (Otto: The Alien from East Frisia [de]),[1] he never succeeded in establishing a "normal" acting career for himself.
[2] Among those actors he dubbed for the German version were Robert Mitchum, Kirk Douglas, Yves Montand, Richard Widmark, James Coburn, Charles Bronson, George C. Scott, Lino Ventura, Trevor Howard, Bud Spencer, Jack Klugman, and Lee Marvin.
Marquis has been described as the "King of Dubbing Artists" (König der Synchronsprecher), and he was one of the most-used voice-artists ever, having accumulated over a thousand credits to his name.