Big Brother 2012 is the upcoming thirteenth series of the British reality television series Big Brother. It will be broadcast on Channel 5 and 5*. It will launch on 5 June 2012. The series has been announced since April 2011 when Channel 5 signed a two-year contract to air the show. In doing so, this is the final series of that contract. With Big Brother 12 broadcast in the autumn of 2011 this series will be the first edition of the show to air in the show's regular summer period on Channel 5 since it acquired the show from Channel 4 in 2011.

Brian Dowling will return to host the series, with Emma Willis returning to host spin-off series Big Brother's Bit on the Side.

Auditions for the series returned to London and Manchester, as well as Glasgow and Cardiff for the first time since the show's move to Channel 5, in February 2012. Auditionees could also submit a video to YouTube to be fast-tracked to the producers interviews.

The revamped eye logo for the series was revealed on Channel 5 on 7 May 2012 at 6.10pm.^{[citation needed]} On 10 May, pictures were released of potential housemates being moved into a cafe in London, whilst having blankets over their heads and bodies to hide their identity. Jamie East and Brian Dowling were also there. On 15 May, Channel 5 aired a 60-second advert for the upcoming series. It features an Olympic-style theme promoting the 2012 Summer Olympics in London, with famous Big Brother tasks being included and Brian Dowling, Emma Willis, Jamie East and Alice Levine overlooking a Big Brother stadium before Brian calls "Let the fun and games begin!".

Big Brother 13 was the 13th season of the American reality television series, Big Brother. The show was broadcast on CBS and Showtime 2 for 75 days, concluding on September 14, 2011 when Rachel Reilly was crowned the winner with four votes from the jury over Porsche Briggs' three. The format of the program remained largely unchanged from previous seasons: a group of contestants, referred to as HouseGuests, were enclosed in the Big Brother House under the surveillance of cameras and microphones. Each week, the HouseGuests voted to evict one of their own until two Houseguests remained on finale night. The winner was decided by the last seven evicted HouseGuests, collectively known as the Big Brother Jury. Julie Chen hosted the season premiere, evictions, and the season finale. The HouseGuests competed against one another for a chance to win a $500,000 grand prize with a $50,000 prize offered to the runner up. This season was promoted as "The Summer of Double Trouble". This was the last season of the U.S. edition of Big Brother to be broadcast in standard definition.