The following is a list of contestants in the twelfth series (2011) of Big Brother UK.
Aaron Allard-Morgan (born 1980) was the winner of Big Brother 2011. He was a contract manager from Weston-super-Mare. He was nominated for eviction in Weeks 1, 3, 5 and 7. On each occasion, he received the highest proportion of votes to save from the public. On Day 41, Aaron was one of four housemates to win a place at a red carpet premiere of horror movie Paranormal Activity 3. Aaron is the twelfth winner of Big Brother UK winning £50,990.
Aaron has made several television appearances since leaving the house on OK! TV, The Wright Stuff and Big Brother's Bit on the Side. He is no longer running a bar in Weston-super-Mare, has split with Faye and has written a book about his experience in Big Brother.
Aden Theobald (born 1992) was a student from Enfield, London. He was nominated for eviction in Weeks 3 and 5. He was saved by a margin of half a percent on the first occasion. On the second occasion he received the fewest votes to save and was evicted.
Alex Rose Lee (born 1992) from South Shields, Tyne & Wear. She worked for McDonald's and has worked as an air stewardess. On 22 February 2011 she took part in BBC Three's Snog Marry Avoid?, appearing in episode 8 of series 4. Alex left the house in third place at the Finale, winning an automatic £30,000 share of the prize fund. She had been spared the public vote in all previous weeks. She was never put up for eviction by her fellow housemates. She was the last woman to leave the house.
Anton Murphy (born 1987) was a musician from Croydon, South London. He ran a record label and produced his own music from his studio in London. He celebrated his 24th birthday in the house on Day 23 when he was crowned 'King of the House' for the day and fooled into believing his single had topped the music charts. He was nominated for eviction in Week 5 and received the second fewest votes to save on Day 36. On Day 39, Anton became 'undead' and joined Jay in the Crypt as part of a Week 6 nominations twist spying on their fellow housemates and setting pranks. On Day 41, Anton rejoined the housemates along with Jay when both burst out of coffins to surprise them during a mock "seance". Anton had one minute to choose a fellow housemate to face the public vote alongside himself and Jay, choosing Jem. Anton was evicted on day 43.