Now, before you start going 'huh?!' there is a reason!
Scarlett told The Sun that Luke made the comment in relation to her slimmed down figure, after she dropped three stone in six months following a warning her health was at risk.
"Luke said to me, 'You're like an iPhone.' I was like, 'What do you mean?' He says, 'Well, you're the same handset and the same on the inside, but I keep getting a software update."
"That's the cutest thing he's ever said," she added.
Scarlett went public with her relationship back in April and, ever since, the smitten couple have gushed about each other on social media. Luke's even had a tattoo done dedicated to Scarlett!
And if things go according to plan, there could be wedding bells pretty soon…
Scarlett teased this week that she's already dropped hints to Luke about the engagement ring she'd like, after popping into her friend's jewellery shop to check out what's on offer.
"I pointed out which one I liked and what my ring size is, just so Luke knows which one to get in the future. If that isn't a hint, I don't know what is!"
I'm A Celebrity starts Sunday at 9pm on ITV.
The full celebrity lineup is: