She was born on 2nd September 1944, in Brodnica. She is an actress and singer. In 1976, she passed an external acting exam for drama actors, in Warsaw.
She started her acting career as a choir singer in the opera house in Bydgoszcz and on stage of Operetka Warszawska, in the latter of which she played during the season 1966-1967. Then, she continued her career as a choir singer for the Music Theatre in Gdynia. In 1971, she started performing as a soloist at the Szczecin Opera House. In 1975, she decided to pursue an acting career and started working for the Juliusz Osterwa Theatre in Gorzów Wielkopolski. After that, she went on to perfom on stages of the Polish Theatre in Poznań (in the years 1979-1981) and the Jerzy Szaniawski Drama Theatre in Płock (in the years 1981-1985). In 1985, she signed a two-year contract with Teatr na Targówku in Warsaw, where she performed as a singing actress.
Eleonora Wallner is also featured in a number of films. Her first appearance on screen was in episode 17 of the legendary TV series ‘07 zgłoś się’ directed by Krzysztof Szmagier, under the title ‘Morderca działa nocą’. In 1987, she was cast in the detective story ‘Koniec sezonu na lody / The End of the Ice Cream Season’ directed by Sylwester Szyszko. In 1989, she played in the film ‘Po upadku’ directed by Andrzej Trzos-Rastawiecki. One year later, in 1990, she partnered up with Jan Nowicki in the film ‘Superwizja / Supervision’ directed by Robert Gliński.