Born on 18 July 1927 in Podhajce near Lwów in the Second Polish Republic to a family of a post office clerk and a teacher.

After graduating from a trade school in Dębica he moved to Kraków, where he started to work as railway worker and study violin play.

[1] Finally in 1949 he moved to Warsaw, where he became a member of Teatr Współczesny, one of the best Polish stages at the time, led by renowned director Erwin Axer.

He was also engaged in the National Theatre in the role of Kordian in Juliusz Słowacki's play of the same title, which gained him much popularity and fame.

He was also admitted to the National Theatre Academy (Akademia Teatralna) in Warsaw and graduated from the Directors' Division in 1956.

Although on the imposition of Martial Law in Poland in 1981 he resigned all his posts and party membership, his reputation never recovered.

However, a week before, on 22 February, Łomnicki died suddenly of a heart attack during one of the last dress rehearsals on the stage of Poznań-based Teatr Nowy.