Married couple Speidi are the obvious favourites to carry out the act at 1/2, closely followed by Bianca and Calum 5/2 who have reality TV history.
Jamie and Jasmine, who share a mutual attraction, are 9/2 to get it on, while singer Ray J – no stranger to a well-publicised romp – is considered more likely to pair up with Bianca 7/1 than reported ex Stacy 10/1.
Spokesman Paddy Power said: “Let’s face it, the way the CBB contestants are picked is on the basis of ‘who’s most likely to bonk?’.
“The fact that there’s a married couple in there obviously skews the betting market – though I would’ve expected it to make Speidi rank outsiders to get it on.
“Maybe me and Mrs P are just watching too much CBB together.”
First couple to have sex in the CBB 2017 house
1/2 Speidi
5/2 Bianca and Calum
3/1 Jamie and Bianca
9/2 Jamie and Jasmine
5/1 Jamie and Nicola
7/1 Ray J and Bianca
10/1 Stacy and Ray J
14/1 Jasmine and Nicola
20/1 Coleen and James Cosmo
50/1 Jedward and Coleen
To win Celebrity Big Brother 2017
3/1 Calum Best
5/1 Speidi
6/1 Austin Armacost
10/1 Ray J
10/1 Coleen Nolan
12/1 Angie Best