Big Brother 10, also known as Big Brother 2009, was the tenth series of the British series Big Brother. It began on 4 June 2009 and was aired on Channel 4 and E4 for 93 days, concluding on 4 September when Sophie Reade was crowned the winner with 74.4% of the viewer's vote. The format of the programme remained largely unchanged from previous series; a group of people, referred to as housemates, are enclosed in the Big Brother House under the surveillance of cameras and microphones. Each week, the viewers decide which of a selection of housemates is evicted and, in the final week, one housemate is voted as the winner. The daily highlights programme was narrated by Marcus Bentley, Davina McCall fronted the launch programme, evictions, special episodes, the final and Big Brother's Big Mouth a