X Factor hosts Olly, 31, and 35-year-old Caroline claim they're just BFFs, although she previously admitted things between them aren't purely platonic.
Now Simon Cowell's bestie Sinitta has suggested things are definitely hitting up between the pair, likening them to Friends couple Ross Gellar and Rachel Green!
Speaking to the Mirror, Sinitta said: "I like Olly and Caroline but I do want them to kiss and get it on.
"It's like Ross and Rachel in Friends, it's getting there!"
Sinitta added: "She always says, 'No, no, no' but then you see them backstage!"
Caroline fuelled the rumours last month when she appeared to suggest she and Olly are friends with benefits.
She told You magazine: "It's a weird chemistry. We have this innate understanding of one another - we don't fancy each other and yet we don't know fancy each other.
"We're not girlfriend and boyfriend, yet we're not totally platonic either."
Come on guys: stop messing about and just get married!