The couple recently moved in together and got a dog, but it's said that they've broken up due to their hectic schedules.
A source told The Sun : "When they left the villa they really thought they would stay together forever, but reality soon set in and things started to get strained.
"They came out to a whirlwind of publicity and after a while, things started to get to them and the cracks appeared.
"They are both incredibly busy and they have decided to call time on their romance."
The shock news comes after reports that the couple had been arguing lately and just one day after Dani released autobiography, in which she talks about their relationship.
The pair recently welcomed an adorable pet bulldog puppy, called Sandy Fincham, into their lives, and shrugged off rumours of a rift by posting plenty of cute pictures.
Similarly to Chris Hughes and Olivia Attwood, from the 2017 series, the pair have been filming a reality show about their lives together after the show.
It's not known whether or not the break up was filmed.
She told The Sun : "I'm going to support whatever decision she makes.
"We work really well together. I bring the energy and she calms me. It is not my place to say what's going on."
There have been lots of reports problems in the relationship lately, but they'd appeared to be putting on a united front throughout.
It was said that they'd been going through a rocky patch while filming their new show, but they had insisted that they're really happy.
But a source had insisted that they'd been squabbling.
A spokeswoman for the couple told Mirror Online at the time: "We try not to pay too much attention to all the gossip.
"We’re just really happy at the moment and are enjoying spending so much time together filming our new show."
Mirror Online has contacted Jack and Dani's representatives for comment.