Agata, the daughter of Polish politician, former Prime Minister of Poland and President of the European Parliament Jerzy Buzek, was born in Pyskowice in Gliwice County, Poland. At an early age she suffered from poliomyelitis and was treated in Germany. After studying at theatre school in Warsaw she went to Paris where she worked as a model.
Buzek has won the Polish Academy Award for Best Supporting Actress in 2003 and the Shooting Stars Award at the 60th Berlin International Film Festival.
In Polish dubbing she's best known as Kida from The Atlantis and Fleur Delacour from Harry Potter series.