Silent Sonata (Slovene: Circus Fantasticus) is a 2011 Slovenian war drama film directed by Janez Burger and has no dialogue. The main producers are the Slovene Stara Gara and the Irish Fastnet Films. Silent Sonata is the first official Slovene-Irish-Swedish-Finnish co-production and was shot in 35 days in Slovenia and Ireland. The world premiere took place on the International Film Festival Rotterdam in 2011. The production crew included members from at least 18 countries. The film's original title was Circus Fantasticus, but only in Slovenia, as it is distributed under its original title.

The film was selected as the Slovenian entry for the Best Foreign Language Film at the 84th Academy Awards, however, the Society of Slovene filmmakers (Društvo slovenskih filmskih ustvarjalcev, DSFU) neglected to officially submit the entry in time because of a misunderstanding within the organization, so it wasn't included in the final list of entries.