Leonid Mozgovoy was born on April 17, 1941 in Tula.

In 1961-1965 he studied at the Leningrad state Institute of theater, music and cinematography (LGITMiK) at the faculty of dramatic art (course of Professor B. V. Zona). His fellow students were Olga Antonova, Lev Dodin, Viktor Kostetsky, Sergei Nadporozhsky, Natalia Tenyakova, Vladimir Tykke. About his teacher and the learning Process L. Brain recalls in detail in the book "School of Boris". Lessons of acting and directing" (St. Petersburg., 2011.).