Le Guess Who? is an annual four-day festival for musical and cultural boundary-crossing in Utrecht. Over the years, Le Guess Who? has become a leading music festival with an innovative, international program. Music performances take place at various venues throughout Utrecht, such as Tivoli Vredenburg, Ekko, and De Helling. In addition, there are programs such as Le Mini Who? and the Lombok Festival. During the festival weekend, Le Guess Who? becomes part of the city through subprograms in art house cinemas, theaters, book stores, and art institutions, including BAK.