Giulio Donnini made his film debut Giacomo Gentilomo's 1946 British-Italian thriller film Tehran and got his first major role two years later.
Born in Milan, Donnini made his film debut in 1946, in Giacomo Gentilomo's Tehran. Tehran is a 1946 British-Italian thriller film co-directed by Giacomo Gentilomo and William Freshman. He got his first mayor role two years later, playing the epileptic murderer Smerdjakov in Gentilomo's The Brothers Karamazov. 
