Claire Richards (born 17 August 1977) is an English singer-songwriter and dancer, who is widely known around the UK for being the lead singer of the 90's pop group, Steps.

Gillian Taylforth (born 14 August 1955) is an English actress, most notable for her portrayal as Kathy Beale in the BBC soap-opera, EastEnders from 1985 to 2000.

On Day 7, after Paula's eviction, Big Brother set Heidi and Spencer a secret task, which was to stage a walkout in front of their fellow housemates but unbeknownst to them, they were actually in a revamped basement, watching the other celebrities in the main house.

Lacey Banghard (born 28 April 1992) is an English glamour model and The Sun's Page 3 girl, from Bedfordshire, England.

Paula Hamilton (born 23 January 1958) is an English model, best known for her appearance in the classic 1987 Mk II Volkswagen Golf TV advert, Changes.

In the early hours of Day 2, Hamilton fell ill and a doctor suggested that she move from the basement to the main house.

It was reported that Ruddock was a last-minute replacement for comedian Jim Davidson, who pulled out of appearing in the show after being arrested by police investigating the Jimmy Savile sex abuse scandal.

Ryan Moloney (born 24 November 1979) is an Australian actor, best known for his portrayal as Jarrod "Toadfish" Rebecchi in the Australian-based soap opera, Neighbours, since 1995.

Ross Richard "Rylan" Clark (born 25 October 1988) is an actor, model, TV presenter and singer from Corringham, Essex, best known as a contestant on the ninth series of The X Factor.

It had been reported that Clark left the house on Sundays (days 3, 10 and 17) to rehearse for The X Factor 2013 live tour, which led to media speculation.

On Day 1, he and Frankie Dettori were set a secret task by Big Brother to watch each celebrities VT's and judge whether they should live in the main luxury house or the dreaded basement.

On Day 23, Clark emerged as the winner of Celebrity Big Brother 11, beating fellow housemates and runners-up, Heidi and Spencer.

Samuel "Sam" Robertson (born 11 October 1985) is a Scottish actor, best known for his acting role as Flynn Spencer in the E4 comedy-drama Beaver Falls.

Before starring in Beaver Falls, he had made an appearance as Adam Barlow in the ITV soap opera, Coronation Street.

On Day 1, he was sent to the basement, after Frankie Dettori and Rylan Clark chose model Lacey Banghard over him to enter the main house.

Patricia "Tricia" Penrose (born 9 April 1970) is an English actress and singer, best known for her acting role as Gina Ward in ITV's longest-running drama Heartbeat, from 1993 to 2010.