Her father announced her birth in a May 2017 tweet reading "Today we have become parents of Klara! My wife Anna is feeling very well Thank you for all your support!"
She has appeared in photos on her parents' insanely popular Instagram accounts.
She has an uncle, Piotr, and an aunt, Milena. Her grandparents, Bogdan and Maria, were a cinematographer and set designer, respectively. She has a younger sister named Laura.
Her father has played for FC Bayern Munich alongside Arjen Robben.