Big Brother 4 is the fourth season of the Belgian version of Big Brother aired in the Flemish Region of Belgium on KanaalTwee. It was preceded by Big Brother All Stars which made it the shortest regular season in Belgium. The show started on 21 September 2003 and finished on 14 December 2003 with a total duration of 85 days. Kristof Van Camp won €50,000. 12 housemates entered the house during the launch.