I'm a Celebrity...Get Me Out of Here! returned for its twelfth series on 11 November 2012 and finished on 1 December 2012.Ant & Dec returned as main hosts, with Laura Whitmore and Joe Swash returning as hosts of spin-off show I'm a Celebrity...Get Me Out of Here! NOW!. On 16 June 2012, it was announced that Russell Kane would be leaving Get Me Out of Here! NOW!. He has been replaced by comedian Rob Beckett.
On 1 December 2012, the series was won by EastEnders actress Charlie Brooks, with Ashley Roberts and David Haye placed runner-up and third place respectively.
Prior to the official announcement of any of the celebrity participants, Nadine Dorries, the UK Conservative Party MP for Mid Bedfordshire, was suspended from her party for failing to tell the Chief Whip she could be absent from the House of Commons and her constituents for a month as she was to appear on the reality TV show and heavily criticised for opting to take part. She is also to be investigated by the Parliamentary Standards Officer over claims she may have breached the MPs' Code of Conduct, with Theresa May, the Home Secretary, added her concerns by saying it is "frankly" the job of MPs to be in their constituency and the House of Commons.
It has been revealed that boxer David Haye received an appearance fee of £165,000, which is about £100,000 more than the other contestants received. In addition to the higher appearance fee, Haye's contract stated that he must have access to a gym – which he was given.