The pair - who had been living alongside Calum's mum Angie Best up until her eviction last night - apparently aren't unknown to one another.
According to The Sun newspaper, the two have known each other "for a while" and had been exchanging texts in the run up to this year's series.
A source said: “Calum and Jasmine have known each other for a while, but kept the extent of their relationship secret.
“Jasmine is completely Calum’s type and he couldn’t wait to see how what they’d started was going to develop in the house."
However the appearance of Angie - who had hidden her spot on this year's line up from even her own son - put a spanner in the works.
The insider spilled: “They were both shocked when his mum turned up, and Jasmine was on her best behaviour for a while to impress Angie.
“Everyone was watching to see what happened between him and his ex Bianca Gascoigne – but he had his eye on Jasmine the whole time.”
Now with Angie evicted, could Calum and Jasmine get closer?
Or could we see another twist to the story, with newbies Chloe Ferry and Jessica Cunningham entering the house in last night's live show?
Celebrity Big Brother airs nightly at Channel 5.