The former lovebirds placed as runners-up in the latest instalment of the reality show and had remained together since returning to the UK from the villa - until this week.
The couple went official in September, when Luca organised a proposal for Gemma, which she said had proved to be a 'special night' and was 'worth the wait'.
Despite their whirlwind love story on Love Island, Gemma shocked her legion of fans on Instagram on Wednesday when she announced that she had made the difficult decision to call off her romance with Luca after weeks of speculation about their strained relationship.
In recent days, Luca has attended several red carpet events including the ITV Palooza on Tuesday, without Gemma who he met on the hit show earlier this year.
And on Instagram, Gemma revealed that she had parted ways from Luca, 23, less than three months after they narrowly missed out on the final.
The daughter of football legend Michael Owen said in a statement: "To all my followers, I wanted to let you know that Luca and I are no longer in a relationship. It wasn't an easy decision but ultimately this is what is best for both of us right now.
"Many of you have been on this journey with us from the very beginning, and I wanted to thank you for your continued support as we start new chapters."
In a statement shared with The Mirror, Luca revealed that he would have liked to have had time to process the split but was bombarded with a string of messages.
He told us: "I would have liked some time to process this privately but as you all already now know sadly Gemma and I made the mutual decision earlier today to go our separate ways.
"We have been on such a journey together and have made some amazing memories which I will treasure.
"I can’t thank everyone enough for their support for us as a couple during and after Love Island."
The shock statement comes just two days after Luca told journalists all was well within his relationship as he appeared on the TV Choice Awards red carpet - with Gemma noticeably absent.
Perhaps hinting there was trouble in paradise, Luca said, rather tellingly: "I think you're naïve to think you're going to go in there to find love.
"Listen, it's called Love Island but I never went in there thinking I'd Gemma, I went in there for a fun time, we had that and on top of that, I've met a girl that I couldn't ask any more from," he told On Demand.
Paige and Adam
Welsh paramedic Paige, took some time away from her long-distance boyfriend, after the footage went viral of her hunky Geordie beau with his arms around another woman in a McDonalds back in September.
After the footage first emerged, Adam's reps told the media: "Adam headed to McDonald’s after a night out with friends.
"His friends were alongside him when a group of girls asked for photos and Adam being his friendly self was open to posing and chatting to the girls, alongside other fans who wanted to chat in the same video.
"Adam understands how this video looks but wants to state that he left the restaurant with his friends and a box of 60 nuggets (with nothing or no one else) with the intention of getting home safely."
They added: "Adam and Paige are currently dating and Adam only has eyes for her."
However, just a few days later, Paige announced her split from Adam before she went on to reveal that there were 'other videos' and 'other girls'.
Paige claimed that she has more video evidence of Adam being unfaithful during their short-lived romance.
Speaking on the Saving Grave podcast, Paige said: "I’m single – living my best life. No I’m kidding, it’s been a really s**t time."
"It’s not just that video. There are other videos that people don’t know about of different people, on the same night, in different locations. At first, I was like, nah do you know what? It’s just an arm. I get that people get flirty. There’s nothing to it. If I’m in the club and a guy puts his arm around me, is it cheating? No.
"And then these other videos came out and I’m just like, ooh. Ooh, I can’t justify this."
She added that there is was chance the pair can work through their differences, saying: "I mean, would you? Would you get back with someone like that? The videos speak for themselves. The ones everyone has seen and the ones only I’ve seen."
Their relationship lasted only two months after they narrowly missed out on a placed in the final of Love Island over the summer and as the cracks are beginning to show.
Ekin-Su and Davide
The couple have continued to develop their relationship since the show, with Ekin-Su having teased last month that are planning to move in together in the coming weeks.
It's been announced they will front their own travel and cooking show for ITV2, which is set to see the pair spend a week in Turkey, before visiting his native Italy.
Other updates have included the couple working out together - just like they did in the villa - as well as Ekin-Su having walked the runway during New York Fashion Week.
Indiyah and Dami
The couple have stayed together since leaving the show, with Indiyah having gone over to Dami's native Ireland earlier this month to spend time with him and his family.
Dami told Sunday World a few weeks ago he plans to relocate to the UK and move in with Indiyah in the near future, adding "there are good opportunities" in London.
He however said at the time that they've been "so busy," with Indiyah having announced several partnerships including having become a brand ambassador for Boots UK.
She's also working with fashion brand PrettyLittleThing as the first ever ambassador for its marketplace, which she described as a "dream come true" when she announced it.
Tasha and Andrew
Since leaving the villa, Tasha has been announced as the first ever pre-loved ambassador for retailer eBay UK and has launched her own shoe collection with brand Simmi.
Andrew - who has been involved with brands like Subway and Whitley Neill Gin since leaving the villa - has been one of the bookies favourites to do Dancing on Ice.
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