Regimantas Adomaitis was born on 31 January, 1937, in Siauliai (Lithuania). After learning in the actor's department of Lithuanian conservatory he made a debut in the theater, and spent several years in the cinema. For his career he played in the theaters Vilnius, Kaunas, Kapsukas. Worked at the motion picture studios of Lithuania, Russia, Moldavia, Ukraine, Latvia, Armenia, and also in Germany. Married to singer Eugenia Baerite.