Sources claim that the duo ‘grew close’, which left some of the other show contestants ‘teasing’ Leon about the relationship.
A source told Daily Star Online: “Leon and Holly grew close while in The X Factor house.
“Some of the lads have been teasing Leon about it, which has been a bit awkward.
“Leon has a girlfriend so all that happened was a cuddle on the sofa, but some contestants wondered if it was more.”
The source also claimed that 16 year old Holly and 22 year old Leon shared a car while travelling to the recent X Factor live finals and were “really flirty”.
OK! Online has contacted representatives for Holly and Leon for comment.
Zayn Malik and Perrie Edwards first met in 2011 and got engaged in 2013 – however, the pair split in 2015 [Wenn/Instagram]
Holly and Leon were eliminated from the singing completion in the third and fourth rounds.
Rak-Su was announced as the winner live during The X Factor 2017 final by host Dermot O’Leary.
As Dermot said the winning act, Rak-Su jumped around with mentor Simon Cowell over the big news.
It was Rak-Su and Grace Davies in the final, after Kevin Davy White was voted off the show in third place on Saturday.
But Rak-Su sailed to victory in the final vote, with judge Simon winning this year’s show.