Karlovy Vary International Film Festival

The pre-war dream of many enthusiastic filmmakers materialized in 1946 when a non-competition festival of films from seven countries took place in Mariánské Lázně and Karlovy Vary. Above all it was intended to screen the results of the recently nationalized Czechoslovak film industry. After the first two years the festival moved permanently to Karlovy Vary.

The Karlovy Vary IFF first held an international film competition in 1948. Since 1951, an international jury has evaluated the films. The Karlovy Vary competition quickly found a place among other developing festivals and by 1956 FIAPF had already classified Karlovy Vary as a category A festival. Given the creation of the Moscow Film Festival and the political decision to organize only one "A" festival for all socialist countries, Karlovy Vary was forced to alternate year by year with Moscow IFF between 1959 and 1993.

The social and political changes that took place after the Velvet Revolution in November 1989 pushed concerns about organizing the Karlovy Vary IFF to the background. The program for 1990 was saved by the release of a collection of Czechoslovak films that had been locked up for years in a storage vault. And the appearance of a number of international guests such as Miloš Forman, Lindsay Anderson, Annette Bening and Robert De Niro helped as well. Future festivals were in doubt. Financial problems and a lack of interest on the part of the government, organizers and viewers almost ended the festival's long tradition in 1992.

In 1994, the 29th Karlovy Vary IFF inaugurated an entirely new tradition. After nearly forty years of alternating with the Moscow IFF, the festival began once again to take place every year. The Karlovy Vary Film Festival Foundation was set up in 1993 co-created by the Ministry of Culture, The City of Karlovy Vary, and the Grand Hotel Pupp. Actor Jiří Bartoška was invited to be the festival's president, and Eva Zaoralová became program director in 1995. Since 1998, the organization of the festival has been carried out by Film Servis Festival Karlovy Vary, a joint-stock company.

The 2020 edition was cancelled due to the COVID-19 pandemic; a shortened event was later scheduled for 18–21 November, which will not be counted as an official edition of the festival (being promoted as the 54th and-a-half edition). Due to the ongoing Russo-Ukrainian War, portions of the Odesa International Film Festival were hosted at KVIFF in July 2022.

To mark its 80th anniversary in July 2026, the festival replaced its traditional opening night fireworks with a 10-minute multimedia performance featuring 1300 drones, making it the largest drone show ever staged in Czech Republic history.