Digital Spy are also convinced the Irish twins - real names John and Edward Grimes - will pop up on the show, having received a cryptic message from them on Twitter, saying that “tonight is the night”.
It’s likely they will be counted as one housemate - like current ‘All Stars’ Heidi Montag and Spencer Pratt - as they were during their first appearance.
This means another, as yet unknown, celebrity will also be joining the line-up.
Rumoured contestants who didn’t appear at the live launch earlier this week include fellow ‘X Factor’ star Sam Callahan and antiques expert Lauren Harries.
‘Celebrity Big Brother’ airs tonight at 9pm on Channel 5.
'Celebrity Big Brother' 2017 Housemates
Heidi Montag and Spencer Pratt(01 of14)
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Ages: 30 and 33 Status: All Stars (runners up of ‘CBB11’) Famous For: Former stars of US reality show ‘The Hills’ Odds Of Winning: 9/1 (credit:Eamonn M. McCormack via Getty Images)
Coleen Nolan(02 of14)
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Age: 51 Status: All Star (runner up of ‘CBB10’) Famous For: Panellist on ITV’s ‘Loose Women’ Odds Of Winning: 16/1 (credit:Mike Marsland via Getty Images)
Nicola McLean(03 of14)
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Age: 35 Status: All Star (finished 7th on ‘CBB12’) Famous For: Model and wife of footballer Tom Williams Odds Of Winning: 33/1 (credit:Ian West/PA Wire)
James Jordan(04 of14)
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Age: 38 Status: All Star (finished third on ‘CBB14’) Famous For: Former professional dancer on ‘Strictly Come Dancing’ Odds Of Winning: 12/1 (credit:Ian West/PA Wire)
Jasmine Waltz(05 of14)
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Age: 34 Status: All Star (evicted first on CBB13’) Famous For: US actress and model Odds Of Winning: 20/1 (credit:Mike Marsland via Getty Images)
Bianca Gascoigne(06 of14)
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Age: 30 Status: New Star Famous For: TV personality daughter of footballer Paul Odds Of Winning: 25/1 (credit:Mike Marsland via Getty Images)
Jamie O’Hara(07 of14)
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Age: 30 Status: New Star Famous For: Footballer for Gillingham. He used to be married to ex-’CBB’ housemate Danielle Lloyd. Odds Of Winning: 12/1 (credit:Mike Marsland via Getty Images)
Ray J(08 of14)
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Age: 35 Status: New Star Famous For: US singer and TV personality best known for his sex tape with ex-girlfriend Kim Kardashian. Odds Of Winning: 9/1 (credit:Mike Marsland via Getty Images)
Calum Best(09 of14)
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Age: 35 Status: All Star (finished third on ‘CBB15’) Famous For: TV personality and son of late footballer George Best Odds Of Winning: 7/1 (credit:Mike Marsland via Getty Images)
Austin Armacost(10 of14)
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Age: 28 Status: All Star (runner-up of ‘CBB16’) Famous For: US TV personality who starred on ‘The A-List: New York’ Odds Of Winning: 10/1 (credit:Mike Marsland via Getty Images)
James Cosmo(11 of14)
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Age: 68 Status: New Star Famous For: Actor who played Jeor Mormont, Lord Commander of the Night's Watch in ‘Game Of Thrones’ Odds Of Winning: 20/1 (credit:Mike Marsland via Getty Images)
Angie Best(12 of14)
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Age: 64 Status: New Star Famous For: Former model and Playboy bunny who was married to late footballer George Best. Her son Calum is also a housemate. Odds Of Winning: 33/1 (credit:Ian West/PA Wire)
Brandon Block(13 of14)
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Age: 49 Status: New Star Famous For: 1990s club DJ who famously had a run in with Ronnie Wood at the BRITs. Odds Of Winning: 16/1 (credit:Mike Marsland via Getty Images)
Stacy Francis(14 of14)
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Age: 47 Status: New Star Famous For: Singer who appeared on ‘The X Factor USA’ in 2011, and previously had beef with Whitney Houston over fellow housemate Ray J. Odds Of Winning: 25/1 (credit:Mike Marsland via Getty Images)