Demi Sims first appeared on British television screens as a cast member of The Only Way Is Essex in 2014. A decade later, she stepped into a boxing ring under the Misfits Boxing banner. Her journey from reality TV personality to combat sports athlete has drawn steady public interest, and her personal life remains a frequent topic of headlines. This profile brings together verified biographical details, career milestones, and relationship updates based on available reporting.
Born on 6 September 1996 in Essex, Demi Sims has built a career that spans television, social media, and professional boxing. She is openly part of the LGBTQ+ community and lives with the skin condition vitiligo, both of which she has spoken about publicly. As of 2026, her focus is split between training for fights and maintaining her presence across Instagram and TikTok, where she shares updates with hundreds of thousands of followers.
Who Is Demi Sims? Biography, Age and Background
Demi Sims: At a Glance
- Full Name: Demi Sims
- Born: 6 September 1996 (age 29)
- Hometown: Essex, England
- Known For: The Only Way Is Essex (TOWIE), Misfits Boxing
- Current Sport: Boxing (Misfits Boxing)
- Partner (2026): Gabby McCarthy (Love Island Australia)
- Instagram Followers: 543K+
- TikTok Followers: 298K+
Key Insights
- Demi Sims successfully transitioned from reality TV star to professional boxer under Misfits Boxing, a significant career pivot reflecting a broader trend of reality stars entering combat sports.
- Her relationship with Gabby McCarthy began in early 2026 following her split from long-term partner Jazz Saunders in December 2025.
- Despite leaving TOWIE in 2022, Demi remains active on social media with over 543k Instagram followers and 298k TikTok followers, using these platforms to share boxing training and personal updates.
- There is significant public curiosity about her father, Tony Sims, a boxing trainer, which remains one of the more notable but less documented aspects of her family background.
Key Facts About Demi Sims
| Fact | Detail |
|---|---|
| Full legal name | Demi Sims |
| Date of birth | 6 September 1996 |
| Age | 29 (as of 2026) |
| Place of birth | Essex, England |
| Nationality | British |
| Sexual orientation | Openly LGBTQ+ |
| Television debut | 2014 on TOWIE |
| Left TOWIE | July 2022 |
| Boxing debut (Misfits) | August 2025 (Misfits 22) |
| Current partner (2026) | Gabby McCarthy (dating from early 2026) |
| Ex-partner | Jazz Saunders (split December 2025) |
Who Are Demi Sims’ Parents? Family Background
Demi Sims comes from a family with strong ties to boxing. Her father, Tony Sims, is a boxing trainer and promoter. Her uncle, Peter Sims, is also noted as a figure within the sport. Together, they have trained well-known boxers including Conor Benn and Anthony Joshua.
Information about Demi’s mother is far more limited. Credible sources do not disclose her mother’s identity or background in any reliable detail. One low-quality online source makes unsupported claims about her mother, but these have not been confirmed by any established outlet and should not be treated as factual.
Demi’s family connection to boxing is a recurring point of curiosity among fans. While her father’s profession places her within a boxing environment, Demi has built her own career in the sport independent of that background.
Demi Sims’ TV Career: TOWIE and Beyond
Demi Sims joined The Only Way Is Essex in 2014 as a recurring cast member. She later returned as a main cast member in 2018. Her time on the show covered storylines around her personal life, friendships, and coming out as bisexual, which she did in her late teens.
Why Did Demi Sims Leave TOWIE?
In July 2022, Demi announced her departure from TOWIE. She stated at the time that she wanted to pursue other opportunities. Her exit marked the end of an eight-year association with the programme, though she occasionally appears in spin-off content such as House of Sims.
Other Reality Shows
Beyond TOWIE, Demi has appeared on Celebs Go Dating and other reality formats. These appearances have helped maintain her visibility outside the Essex-based show.
Demi Sims represents a growing trend of reality TV personalities moving into combat sports. Misfits Boxing, the organisation she fights for, has become known for signing influencers and reality stars, creating crossover events that draw large viewing audiences.
Is Demi Sims a Boxer? Misfits Boxing Career
Yes, Demi Sims is a professional boxer fighting under the Misfits Boxing banner. Her connection to boxing runs through her family, but she has built her own competitive record in the ring.
What Is Demi Sims’ Boxing Record?
Demi Sims holds a publicly reported boxing record of 1 win, 0 losses. She made her professional debut at Misfits 22 – Ring of Thrones in August 2025, where she defeated Nadeshi Hopkins.
The fight marked a major step in her career pivot. Misfits Boxing has a partnership with Netflix, which broadcasts their events, meaning Demi’s fights reach a large global audience.
Is Demi Sims on the Netflix Misfits Card?
Misfits Boxing has a broadcast partnership with Netflix, making Demi’s fights available to subscribers on the platform. Her Instagram bio lists her as a “Boxer for @misfitsboxing” and notes she has been involved with events tied to Tyson Fury.
Demi Sims’ move into boxing follows the path of other reality stars who have entered combat sports through events promoted by KSI and Jake Paul. These crossover bouts generate interest from existing fanbases rather than traditional boxing audiences.
Who Is Demi Sims Dating? Relationship History in 2025
Demi Sims’ romantic life has been a major focus of public interest. In 2025, she went through a notable breakup and began a new relationship that drew attention across reality TV fan communities.
Did Demi Sims and Jazz Split?
Yes. Demi and her long-term partner, Jazz Saunders, split in December 2025. The reason for the breakup has not been publicly detailed, and neither party has made a comprehensive statement about it.
Who Is Demi Sims’ Girlfriend Gabby McCarthy?
Demi Sims began dating Gabby McCarthy in early 2026. Gabby McCarthy is known for appearing on Love Island Australia. The relationship places Demi at the intersection of two reality show universes: TOWIE and Love Island Australia.
Demi Sims and Gabby McCarthy Relationship Timeline
- December 2025: Demi and Jazz Saunders split.
- Early 2026: Demi begins dating Gabby McCarthy.
- April 2026: Reporting confirms the relationship publicly, with both appearing in social media posts together.
Some online sources mention earlier relationships and a possible connection to a KSI vs. Dillon Danis-related fight in 2025. Neither of these is reliably established in credible reporting. The relationship timeline with Gabby McCarthy is the most consistently reported detail from 2026 sources.
Demi Sims on Social Media: Instagram and TikTok
Demi Sims maintains a strong presence across major social media platforms. Her Instagram account, @demsims, has over 543,000 followers. On TikTok, @demisims has more than 298,000 followers.
Her content includes training footage, lifestyle posts, boxing updates, and personal milestones. These platforms serve as her primary channels for communicating with fans and documenting her transition from television personality to athlete. Her Snapchat username has not been officially confirmed in top search results.
Demi Sims: Life and Career Timeline
- 1996: Born on 6 September in Essex, England.
- 2014: First appears on The Only Way Is Essex (TOWIE) as a cast member.
- 2018: Returns to TOWIE as a main cast member.
- 2021: Begins relationship with partner Jazz Saunders.
- 2022: Leaves TOWIE in July to pursue other opportunities.
- 2023-2024: Public appearances, social media growth; training for boxing begins.
- August 2025: Boxing debut at Misfits 22, wins against Nadeshi Hopkins.
- December 2025: Splits with Jazz Saunders.
- Early 2026: Begins dating Gabby McCarthy, continues boxing career.
What We Know vs. What Is Unconfirmed
| Established Information | Information That Remains Unclear |
|---|---|
| Demi Sims is a television personality and boxer. | The identity of her father’s full role is documented but some details remain sparse. |
| She was born on 6 September 1996. | Her exact net worth is unknown; estimates vary widely. |
| She appeared on TOWIE from 2014 to 2022. | Her full boxing record beyond one win is not publicly detailed. |
| She is a boxer for Misfits Boxing. | Her height is not officially confirmed across reliable sources. |
| She split from Jazz in December 2025. | Details about her mother’s identity are limited. |
| She is dating Gabby McCarthy as of early 2026. | The exact reason for her split with Jazz has not been disclosed. |
Demi Sims: From Reality TV to Boxing Ring – A Career Analysis
Demi Sims represents a growing archetype in entertainment: the reality TV star who pivots to combat sports. Following the path of influencers and reality personalities entering boxing through Misfits Boxing and events promoted by KSI and Jake Paul, Demi has leveraged her TOWIE fame to build a second career in the ring.
This transition aligns with the rising popularity of crossover boxing events, where viewership is driven by existing fanbases rather than traditional boxing credentials. Her relationship with Gabby McCarthy also places her at the intersection of two reality TV universes, expanding her cross-platform appeal. Her active social media presence suggests she maintains strong engagement with her audience, which is critical for sustaining both her boxing career and brand partnerships.
Sources and Key Quotations
“Demi Sims is currently dating Love Island Australia star Gabby McCarthy. Demi and Jazz split in December 2025.”
Closer Online, April 2026
“Boxer for @misfitsboxing 🥊 @netflixuk 🎥 In Thailand working on the @tysonfury fight”
Demi Sims Instagram bio
- Demi Sims – Wikipedia (Biography reference)
- Closer Online: Demi Sims 2026 update (News article, April 2026)
- Demi Sims on Instagram (Official social media)
- Demi Sims on TikTok (Official social media)
- Champions Speakers – Demi Sims profile (Speaker agency profile)
- Misfits Boxing Official (Promotion website)
What’s Next for Demi Sims?
Going into 2026 and beyond, Demi Sims is expected to continue her boxing career with Misfits Boxing. Her relationship with Gabby McCarthy will likely generate continued media interest. She may also explore further reality TV appearances or brand partnerships related to fitness and LGBTQ+ representation. There is potential for a return to television in a documentary format chronicling her boxing journey.
Readers interested in other figures who have made similar transitions may find the profile of Joe Sugg – Biography, Net Worth, and Strictly Come Dancing Career useful for comparison. For those following combat sports careers, the Belal Muhammad – Complete UFC Record, Ranking and Career Stats piece offers a different angle on professional fighting.
Frequently Asked Questions
What is Demi Sims’ full name?
Demi Sims.
How tall is Demi Sims?
Exact height is not publicly confirmed, but she is often listed around 5’7″ (170 cm).
Does Demi Sims have siblings?
There is no widely reported information about siblings in available sources.
What is Demi Sims’ net worth?
Her exact net worth is not publicly disclosed. Estimates vary from £100,000 to £500,000, but these are unconfirmed.
Is Demi Sims on Snapchat?
Her Snapchat username is likely linked to her brand but is not officially confirmed in the top search results.
When did Demi Sims start boxing?
She began boxing professionally in 2025 with Misfits Boxing, though she may have trained prior.
Did Demi Sims win her boxing matches?
She holds a 1-0 record with a debut win at Misfits 22 in August 2025.
What is Demi Sims’ connection to Netflix?
She is associated with Misfits Boxing, which has a partnership with Netflix to broadcast events.
Why did Demi Sims and Jazz split?
The specific reason for the split in December 2025 has not been publicly detailed.
Is Demi Sims friends with other TOWIE stars?
As a former cast member, she maintains some connections, but current friendships are not heavily documented.
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David Harwood is Editor-in-Chief at Headlines UK, overseeing editorial policy, corrections, standards and publication decisions across UK news coverage.