Dark Blue World is a 2001 film by Czech director Jan Svěrák, the Academy Award-winning director of Kolya, about Czech pilots who fought for the British Royal Air Force (RAF) during the Second World War. The screenplay was written by Zdeněk Svěrák, the director's father. The film stars Czech actors Ondřej Vetchý, Kryštof Hádek and Oldřich Kaiser. British actors include Tara Fitzgerald, Charles Dance and Anna Massey.

Oldřich Kaiser is a Czech television, film, and stage actor known mostly for his comedic roles.