The Essex hunk, 26, appeared shocked when Dani, 22, told him her father was actor Danny Dyer during last night's show, but we can confirm the pen salesman was well aware of her EastEnders star dad and has been a fan of hers for months.
Jack has been stalking the beauty on Instagram since April 27, in which time he has liked a flurry of her snaps – including one of her posing with dad Danny and mum Joanne Mas.
The revelation comes after Jack pretended to be completely taken aback when Dani revealed her dad's identity during last night's show.
Discussing her ambition to be an actress, she let slip that acting runs in the family, telling him: “My dad… let’s just get it out the way. My dad’s Danny Dyer.”
Jack then smiled and looked shocked, though his reaction seemed to impress Dani who later admitted she was delighted that he didn’t quote one of her dad’s famous lines.
“I had to bring up my dad, I knew sooner or later that I would mention who my dad was. And it was actually a really nice reaction,” she said.
“Usually boys get a little bit… they start getting all ‘gangster’ and they start quoting films. He didn’t quote one quote and I thought ‘thank God for that.”
But it seemed his false shock didn't fool many, as viewers mocked his response on Twitter.
One joked: "When Jack found out about Dani's dad it's like purr to the lease. He knew. Adam knows."