While studying at Wrocław University of Science and Technology, Agnieszka won the Miss Polski beauty pageant held at the Forest Opera in Sopot on 19 July 1991.

On 13 October 1991, she became the first Polish winner of the Miss International beauty pageant held in Tokyo, Japan.

[4] Kotlarska narrowly escaped death when at the last minute, she backed out of flying on TWA Flight 800, which crashed with no survivors off Long Island, New York on 17 July 1996.

Lisiewski was later arrested for stabbing a Romanian man during an attempted burglary in the district of Psie Pole in 2014.

[10] Parts of the 2021 book Wenus umiera by freelance author Aleksander Sowa [pl][11] were, according to readers, based on Kotlarska's life and death.