The series launched on 27 August 2015[1] on Channel 5 in the United Kingdom and TV3 in Ireland, and ended after 29 days on 24 September 2015.

[4] Austin Armacost returned to the house for Celebrity Big Brother 19 as an All-Star, representing this series.

The series will look back at some of the best moments from Celebrity Big Brother history and will feature a range of special guests.

[6] Channel 5 confirmed on 31 July 2015 that Big Brother's Bit on the Side would be airing seven nights a week for the first time since 2014.

[7] The first five-second teaser for Celebrity Big Brother aired on 31 July 2015 confirming the theme UK v USA.

[13] Austin Armacost is an American reality television personality, who is best known for his role in The A-List: New York, as well as dating fashion designer Marc Jacobs.

He entered the House on Day 2, competing against Janice Dickinson in order to win the title of "Prime Minister".

Baldwin is known for his role as Detective Beau Felton in the popular NBC TV series Homicide: Life on the Street.

She came to prominence after being cast in the reality television series 16 and Pregnant, which documented the pregnancies and first months of motherhood for several young women.

James Hill is an English reality television personality, who rose to fame following his appearance during the tenth series of The Apprentice.

She entered the House on Day 2, competing against Bobby Davro in order to win the title of "President".

Jenna Jameson is an American entrepreneur, webcam model and former pornographic film actress, who has been called the world's most famous adult-entertainment performer and "The Queen of Porn".

Isaac Freeman III, better known by his stage name Fatman Scoop (or simply Scoop), was an American hype man, hip hop promoter and radio personality famed for his on-stage rough, raw, loud voice.

Stevi Ritchie and Chloe-Jasmine Whichello, the latter of whom is better known by her stage name Chloe Jasmine, are a couple who appeared (separately) in the eleventh series of The X Factor.

However, she was ejected on her second day in the House after it was discovered that she had posted items on social media proclaiming her support for Adolf Hitler, Nazism and white supremacism, along with photos of herself in Nazi outfits.

On Day 7, Jennie Bond, a British journalist and television presenter, briefly entered the House as part of the "Big Brother Royal Family" task where she interviewed Lord James and Lady Natasha.

[17] On Day 23, presenter Emma Willis briefly entered the House as part of an eviction showdown leading to Farrah's departure.

On Day 27, Eamonn Holmes briefly entered the House as part of the "Battle of the Nations" task, in which he would ask questions to the Housemates about the public's perception of them.

He later returned that day as a guest on Big Brother's Bit on the Side, which was presented from inside the House.