Born in 1904 in Austria-Hungary, he rose to fame with his portrayal of a serial killer in Fritz Lang's "M" (1931). Known for his distinctive voice and unique appearance, he became a staple in Hollywood's noir and horror genres. His career included notable roles in "The Maltese Falcon" (1941) and "Casablanca" (1942). Often cast as a villain or eccentric character, he worked with directors like Alfred Hitchcock and was a frequent collaborator with actor Humphrey Bogart. He passed away in 1964 in Los Angeles.