In 2018, she graduated from the Aleksander Zelwerowicz National Academy of Dramatic Art in Warsaw.

[3] Kaar's first screen role was in the 2014 BBC miniseries The Passing Bells, where she played a Polish nurse, the love interest of one of the two leads.

[4] She was a lead actress in the 2015 Polish television series Aż po sufit!

[citation needed] Her film debut was in the Indian Bollywood movie Shivaay (2016) directed by Ajay Devgan.

[2] In 2017, she appeared in Starz's TV series American Gods, playing Zorya Polunochnaya.