Maria i Piotr

Zofia Mrozowska

As Ewa Curie

Anna Ciepielewska

As Maria Skłodowska-Curie

Piotr Pawłowski

As Pierre Curie

Władysław Hańcza

As Paweł Appel

Elżbieta Gaertner

As Nurse

Danuta Gallert

As Lab Worker

Renata Kossobudzka

As American Journalist

Zofia Małynicz

As Teacher

Wiesława Niemyska

As Bronisława

Irena Oberska

As Woman taking Maria's Reference Letter