The couple appear to have modelled in the same gym shoot, according to an eagle-eyed Twitter user.
Things have moved fast between the surfer, 23, and footballer, 22, since they were first seen meeting on the show a week ago.
Laura's arrival caused Jack to break things off with Laura Anderson, 29, and since then they have been spotted smooching on a number of occasions, including on a recent beach date.
However, it seems the pair may have met before signing up to the show with an advert for gym chain David Lloyd showing Jack beside a blonde woman who looks very similar to Laura.
Sharing the image, a Twitter user wrote: "Ok wait, what? Laura and Jack already new each other? #LoveIsland #LoveIslandAftersun"
The post quickly racked up a high number of shares and likes.
However, it has divided fans, who are split between whether the blonde woman is the Devon beauty or not.
One, who was convinced it is Laura, wrote: "Wtf omg!!!"
However, another commented: "I don't think that's Laura @DrMiguel92"
It comes as fans demanded the return of the popular lie detector and fake baby challenges from last year.
Viewers slammed the Ladies Day space hopper race in tonight's episode as "boring" – before it was revealed that the lie detector will be returning tomorrow night.
In this evening's episode the girls in the villa took part in a challenge called Ladies Day.
They were seen racing on horse space hoppers around a fake race course, before being sprayed with champagne by the boys.
Unfortunately, the task didn't go down too well with fans, who reminisced about the time Chris Hughes hilariously cared for plastic doll Cash, and when Gabby Allen was seen squirming while strapped to a lie detector.
However, at the end of tonight's episode it was confirmed in a preview that the lie detector is returning to the villa tomorrow evening.
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