In March, Charlie and Ferne assured fans that they had decided to remain mates after their long-term relationship ended last year.
However, some fans are not entirely convinced, as the pair have been dropping every hint imaginable that they are back together.
After deciding to be "friends", Ferne and Charlie looked pretty close during a night out at Funky Buddha nightclub in London on 18 March.
And just last week, Ferne posed alongside Charlie while dressed as an angel: "Fallen angel with @charliesims_," she Instagrammed.
The pair have also been in constant Twitter communication and yesterday (7 April) tweeted the identical photograph of food after going out for lunch.
Charlie told his followers: "Had an amazing lunch in La Petite Maison .. Food was beautiful .. Wine was .. And the company was even better." He then posted a 'kissing' emojicon.
Ferne, meanwhile, shared an emojicon of a boy and girl and wrote: "La Petit Maison lunch!"
The pair's fans were quick to reply. One said: "@fernemccann @charlessims_ back together then?" Another added: "OMGOMGOMGOMGOMG you and @charlessims_ are back together..."
This morning (8 April), Ferne posted another new photograph of herself and Charlie on Instagram and it shows them sat at a train station together.
Alongside it, she said: "True #friendship comes when silence between two people becomes comfortable."
As one Instagram follower said, if they really are just friends: "Love how close you still are."