Rylan Clark, Helen Wood and Nikki Grahame are some of the past housemates tipped to return to Big Brother this year.
They're the favourites to re-enter the house after it was revealed that this summer's Timebomb theme could see the show jump back to series past, with former housemates, old tasks and previous twists all making comebacks.
Speaking about who she'd like to see back in the house this week, Big Brother host Emma Willis said: "I loved Gina and Dexter from a couple of years ago. I really liked Chris and Ashleigh from last year.
"Someone I would have liked to see more of, and I don’t know whether it would have been a good or bad thing, was Sally Axl. She was so hardcore. We may have missed out on a great housemate by her leaving after a week. That’s not saying I’d like her to go back in, but I wonder what she might have given us!
"Dexter always fascinated me, but he lasted the distance, which I was really pleased about. He is the perfect example; you think he is one thing and then this person just unravels in front of you and you realize that they are someone else."
And as for former Celebrity Big Brother housemate Rylan, who is odds-on favourite to go back in, the Bit On The Side presenter commented: "I would love to see the likes of Nikki Grahame, Aisleyne, Makosi, Heidi and Spencer. I would love to see the core Big Brother people like Nadia."
Bookies Paddy Power have given out some odds on who they reckon will be back and the likes of Helen Wood and Josie Gibson are favourites, along with series one contestants Craig Phillips and Nick Bateman.
A spokesperson for Paddy Power said: "This series’ timebomb theme could be seriously explosive, and with Rylan the favourite ex-housemate to return, anything could happen.”
1/4 Rylan Clark
5/6 Helen Wood
5/6 Craig Phillips
5/6 Nikki Grahame
5/6 Nick Bateman
1/1 Josie Gibson
5/4 Brian Dowling
2/1 Heidi & Spencer
2/1 Helen Adams
2/1 Pete Bennett
3/1 Makosi Musambasi
3/1 Kate Lawler
7/2 Aisleyne Horgan-Wallace
7/2 Nadia Almada
7/2 Anthony Hutton
Big Brother 2015 kicks off on Tuesday night on Channel 5.