Gabby Allen is not your average reality star. Honestly, if you watched her back in 2017 during the third season of Love Island, you probably remember her as the fitness-obsessed blonde who stayed loyal to Marcel Somerville while everyone else was losing their minds. She was the "girl next door" with a Scouse accent and a killer work ethic.
But things aren't always what they seem on a TV screen.
Since that first stint in the villa, Gabby’s life has been a literal roller coaster of high-profile breakups, a massive career shift into the wellness space, and a surprising return to the limelight in 2025 and 2026. Most people think they know the story because they saw the headlines about Marcel's cheating. They don't. There is a lot more to her journey than just being the "betrayed girlfriend," including a recent victory on Love Island: All Stars and a grueling stint on Celebrity SAS: Who Dares Wins.
The Love Island Journey and the Marcel Fallout
Gabby entered the 2017 villa as a bombshell on Day 7. She didn't just walk in; she sprinted into a relationship with Marcel Somerville, the former Blazin' Squad member. They were the villa's "parents." While other couples were screaming over who made the best breakfast, Gabby and Marcel were the stable ones. They finished fourth, and for a while, it looked like they were the real deal.
Then, the Mexico trip happened.
In May 2018, the news broke that Marcel had cheated on Gabby while they were literally on holiday together. It wasn't just a "mistake" at a club; it was a calculated betrayal that left Gabby—and the public—completely shocked. She later admitted it was a "tough couple of days," but that’s an understatement. It was a public humiliation.
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Fast forward to January 2025.
The producers did what they do best and put both of them back in the villa for Love Island: All Stars. Talk about awkward. Watching them share a bed again was probably one of the most uncomfortable things on British television in years. Marcel actually broke down in tears, apologizing for the hurt he caused seven years prior. Gabby, being the professional she is, basically told him he’d been "sacked" from his role as "Dr. Marcel."
She didn't go back there. Instead, she found a new connection with Casey O’Gorman.
Winning All Stars and the Aftermath
Gabby and Casey didn't just date; they won the whole thing. They beat out couples like Luca Bish and Grace Jackson to take the crown in early 2025. But the victory lap was... complicated. Fans started turning on them pretty quickly. Why? Because they kept taking shots at other contestants like Ekin-Su Cülcüloğlu and Curtis Pritchard in interviews.
It felt a bit petty.
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The relationship with Casey didn't last, either. By June 2025, they’d split up. Gabby moved on quickly, sparked by a flirty encounter on Aftersun with Blu Chegini. It's basically a revolving door of Islanders at this point.
Gabby Allen: The Fitness Pivot and Health Struggles
While the dating drama gets the clicks, Gabby’s actual "day job" is where she’s found the most success. She isn't just a "fitness influencer" who posts three selfies a week. She’s a qualified personal trainer and professional dancer who trained at the Italia Conti Academy.
She launched her app, Shape Up with Gabby, which has actually stood the test of time. Most reality stars launch a "plan" and it disappears in six months. Hers is still going strong in 2026.
She’s also been incredibly open about her health, which is a big reason why her followers are so loyal.
- PCOS Diagnosis: Gabby revealed that she has Polycystic Ovary Syndrome, which affects her fertility and how she trains.
- Egg Freezing: In March 2025, she candidly discussed freezing her eggs to take the pressure off her "body clock."
- Scoliosis: People often forget she had major spinal surgery as a teenager to correct a 70-degree curve in her back. She has a massive scar down her spine that she shows off with pride.
Celebrity SAS and 2026
If you think she’s gone soft, you haven't seen her on Celebrity SAS: Who Dares Wins in January 2026. She’s currently competing alongside people like Dani Dyer and Pete Wicks. It’s brutal. She recently broke down on camera, not because of the physical tasks, but because of the "mind games" and the lingering grief over the death of her father.
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It’s a side of her we didn't see in the villa.
On Love Island, you’re worried about who’s "pulling you for a chat." On SAS, you’re worried about sleep deprivation and being shouted at by former special forces soldiers. Gabby has noted that viewers only see about 20% of the actual struggle.
What Most People Get Wrong
The biggest misconception about Gabby is that she’s just "that girl who got cheated on."
In reality, she’s one of the most business-savvy women to come out of the franchise. She’s built a fitness empire that doesn't rely on her being "in a couple" to stay relevant. She’s a 33-year-old woman navigating a PCOS diagnosis, a career in the public eye, and the weird reality of having to work with your ex-boyfriend on national TV.
It's messy. It's real. It’s also kinda inspiring.
If you want to follow Gabby’s lead and focus on your own wellness rather than villa drama, her "Shape Up" app offers 4-week HIIT programs that require zero equipment. It's probably a better use of your time than refreshing her Instagram to see who she’s dating next.
Next Steps for You:
If you're looking to replicate Gabby's fitness results, focus on high-intensity interval training (HIIT) combined with a balanced approach to nutrition that accounts for hormonal health (especially if you're managing conditions like PCOS). You can find her current "Island Body" routines on the Apple App Store or follow her 2026 journey on Channel 4.