The first series of Promi Big Brother began on 13 September 2013 and ended on 27 September 2013. It is the first series of the Big Brother franchise on Sat.1, after it left RTL II, and the first in Germany after a 2-year hiatus. 12 housemates ("promis") entered the house on Day 1 with one more joining during the series. The show is co-hosted by Cindy aus Marzahn and Oliver Pocher.