
Ivan Triesault (born Johann Constantin Treisalt; 13 July [O.S. 1 July] 1898 in Reval (now Tallinn) – January 3, 1980 in Los Angeles) was an Estonian-born American actor. His parents were from the island of Hiiumaa.
His first stage appearance was at the German Theatre in Tallinn aged 14, before moving to the United States aged 18. There he began to train in acting and dance, working on Broadway before moving into film. His notable roles include appearances in Cry of the Werewolf (1944), The Story of Dr. Wassell (1944), A Song to Remember (1945), Notorious (1946), 5 Fingers (1952), Jet Pilot (1957), Journey to the Center of the Earth (1959), It Happened in Athens (1962), Von Ryan's Express (1965), Batman (1966) and The Wild Wild West. He died in 1980 due to cardiac failure at age 81.
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Notorious
1946 · as Eric Mathis

Batman
1966 · as West German Delegate (uncredited)

Journey to the Center of the Earth
1959 · as Prof. Göteborg

The 300 Spartans
1962 · as Demaratus

How to Marry a Millionaire
1953 · as Phillip - Captain of Waiters (uncredited)

The Young Lions
1958 · as German Colonel (uncredited)

Barabbas
1961

Von Ryan's Express
1965 · as Von Kleist

Viva Las Vegas
1964 · as Head Captain (uncredited)

Fraulein
1958 · as Prof. Julius Angermann

5 Fingers
1952

The Bad and the Beautiful
1952 · as Von Ellstein

Cimarron
1960 · as Lewis Venable (uncredited)

The Desert Fox: The Story of Rommel
1951 · as German Major

D.O.A.
1949 · as Photographer (uncredited)

The Mummy's Ghost
1944 · as Museum Guide (uncredited)

Days of Glory
1944 · as German Lieutenant (uncredited)

Jet Pilot
1957 · as Gen. Dimitri Langrad