[?]

US

Janice Dickinson (worlds first supermodel, television judge and personality)
LaTavia Roberson (singer, ex-member of Destiny's Child)
Dina Lohan (television personality, mother to Lindsay Lohan)
Chima Simone (E! television presenter and reporter, ex BBUS housemate)
Donald Faison (actor)
Kris Humphries (basketball player, ex-husband to Kim Kardashian)
Alex Mapa (actor)

UK


Danniella Westbrook (troubled actress)
Vicky Pattinson (reality star)
Sammy Winward (actress)
Luke and Elliott Tittensor (actors, twins)
Jamie Laing (Made in Chelsea star)
Brian Harvey (singer)
Anthony Ogogo (olympic boxer)

I've tried to keep a little sense of realism, and I've tried not to go overboard with the UK housemates because producers would obviously be spending mega-money on the US stars compared to the UK ones.

Chima and Anthony are both ex-Big Brother housemates (BBUS and BBCH) but neither are necessarily renowned for their Big Brother experiences so I think a 'secret mission' type where the housemates will have to work out which two housemates have been contestants within the Big Brother franchise before.

Luke and Elliott Tittensor also have the possibility for a secret mission, perhaps the first UK twin swap?