Celebrity Big Brother 11 was the eleventh series of the British reality television series Celebrity Big Brother. It launched on 3 January 2013, and aired on Channel 5 and 5* for 23 days concluding on 25 January 2013. The series is part of a new two-year contract signed by Channel 5 with Endemol to air the show until 2014. It is the fourth celebrity series to air on Channel 5 and the sixth series of Big Brother to air on the broadcaster since they acquired the show. This series is the highest rated series since moving to Channel 5 alongside Celebrity Big Brother 8 with an average of 2.8 million. This was the last series of Big Brother to be presented by Brian Dowling.