[1] In 1948 he graduated from The Aleksander Zelwerowicz National Academy of Dramatic Art in Warsaw, which was located in his hometown of Łódź at the time.
He was also a member of the PZPR, including also being a Secretary of the Communist Party Committee of the Company at the National Theatre.
Shortly after the introduction of martial law in Poland, Kłosiński openly supported the decision of the authorities at the time, even on public television.
Public support for the introduction of martial law covered by the boycott by the audience.
Kłosiński died on 8 November 2017, just 11 days short of his 97th birthday.