Big Brother is the Croatian version of the international reality television franchise Big Brother created by producer John de Mol Jr. in 1997. The show was aired on RTL Televizija. It followed a number of contestants who live in an isolated house trying to avoid being evicted by the public with the aim of winning a large cash prize at the end of the run. Throughout the season, housemates are completing tasks, every incomplete task reduces the prize.

In the first four regular seasons and the celebrity season, the house was located in Jadran Film studios, in Dubrava, Zagreb. In the fifth season, the house used is the Big Brother Thailand house.

There have been seven regular seasons and one celebrity season. Big Brother holds the record for having the most regular seasons with only male contestants winning the show each year (although the celebrity edition was won by a woman).