Anthea Turner's ex-husband Grant Bovey, 80s pop star Sam Fox and Ariana Grande's half-brother Frankie are rumoured to be heading to the Celebrity Big Brother house.
The full line-up for the reality show has reportedly been leaked, with others on the list including Geordie Shore star Marnie Simpson, The Only Way Is Essex's Lewis Bloor and Danity Kane singer Aubrey O'Day.
Channel 5 said it does not comment on speculation about housemates.
Celebrity Big Brother will launch on Thursday, with Emma Willis hosting and Rylan Clark-Neal presenting the Bit On The Side spin-off.
Property magnate Grant, who has previously been declared bankrupt, was divorced from former Blue Peter presenter Anthea last year after 15 years of marriage.
Sam's appearance would follow previous stints on Celebrity Wife Swap, I'm A Celebrity ... Get Me Out Of Here! and Celebrity Come Dine With Me.
Frankie Grande, who has a career on Broadway in the US, would hope to enter the house with his half-sister's support.
The X Factor's Katie Waissel has been named as part of the rumoured line-up and could be hoping to gain fans with a reality TV appearance.
Katie failed to win over the audience during her X Factor appearance in 2010 and finished seventh.
She was one of the show's most controversial contestants and did not impress the public, frequently finishing bottom of the public vote.
Katie would not be the only former X Factor contestant in the house, as fellow reject Chloe Khan is also rumoured to be joining the show.
Also known as Chloe Mafia, she was not successful on the singing show but went on to become a social media personality and glamour model.
Vicky Pattison's ex Stephen Bear is also rumoured to be heading into the house.
I'm A Celebrity champion, Loose Women panellist and former Geordie Shore star Vicky had a tumultuous relationship with Stephen after they both appeared on reality show Ex On The Beach.
-- Bear (@stephen_bear) July 22, 2016
Former I'm A Celebrity champion Christopher Biggins is also on the list and could be hoping for another reality TV win to add to his collection.
Others on the 13-strong "leaked" list include Mob Wives star Renee Graziano, US reality star Beth Chapman, and Absolutely Fabulous actress Helen Lederer.