The fourth season of Let's Dance began on 23 March 2011. The judges for this season were confirmed in March 2011 as Joachim Llambi, Harald Glööckler, Motsi Mabuse as a replacement of Isabel Edvardsson and Roman Frieling as a replacement of Peter Kraus. It was reported in February 2011 that Isabel Edvardsson and Peter Kraus would not return in season 4, after being judges for only one series.