Ulrika and Makosi from Buckinghamshire take part in Ultimate Big Brother
Buckinghamshire's Ulrika Jonsson and Makosi Musambasi will compete in Channel 4's Ultimate Big Brother.
Previous housemates, including 'Nasty' Nick Bateman and John McCririck have entered the Hertfordshire house in the programme's last ever series.
TV personality and former weather girl, Ulrika won Celebrity Big Brother six.
Makosi, 29, from Aylesbury, best known for her Jacuzzi encounter with fellow contestant, Anthony Hutton came third in Big Brother six.
Ultimate Big Brother Contestants
Nick Bateman BB1
Brian Dowling BB2 winner
John McCririck CBB3
Chantelle Houghton CBB4 winner
Samuel Preston CBB4
Nadia Almada BB5 winner
Makosi Musambasi BB6
Ulrika Jonsson CBB6 winner
Nikki Grahame BB7
Josie Gibson BB11
Over four million people tuned into watch Josie Gibson from Bristol be crowned as Big Brother series 11 winner on Tuesday 24 August 2010.
The bubbly blonde had a chat with Davina about her experience and hugged 'close friend' fellow contestant, John James before she was sent back into the house for the Ultimate programme.
Eleven former celebrity and non-celebrity contestants of the programme filmed at Elstree Studios in Borehamwood make up the new 18-day series.
Two other contestants are expected to enter the house at a later date.