Tiit Lilleorg (November 25, 1941 – January 15, 2021) was an Estonian stage, film and television actor and co-founder and director of the Ida Dance School.

Tiit Lilleorg was born in Tartu, Estonia. His father Toivo Lilleorg was a journalist, and his mother was soprano and musician Helga Lilleorg (née Hansson). Lilleorg grew up with the theatre, as his mother performed as a choral singer, soloist, concertmaster and teacher at the Vanemuine theatre in Tartu. He studied acting at the Tallinn State Conservatory (now, the Estonian Academy of Music and Theatre) from 1961 until 1963, and the Leningrad Conservatory from 1966 until 1968.