If you are searching for KSI age, the answer is straightforward: KSI was born on June 19, 1993, making him 33 years old as of August 27, 2026. His full name is Olajide Olayinka Williams Olatunji, although he is much better known by his professional name, KSI.
KSI has built a career that goes far beyond YouTube. He became widely known through gaming and commentary videos, particularly around FIFA, before expanding into music, boxing, entertainment, and business. He is also a founding member of the British YouTube group the Sidemen.
This guide explains KSI’s age and birth date while also providing useful background about his early life, education, career, achievements, and the major milestones that helped make him one of Britain’s best-known internet personalities.
Key Takeaways
- KSI is 33 years old as of August 27, 2026.
- His full name is Olajide Olayinka Williams Olatunji.
- KSI was born on June 19, 1993.
- He was born in London, England, and was raised in Watford, Hertfordshire.
- He became famous through YouTube gaming and commentary content before moving into music, boxing, and entertainment.
- KSI is a founding member of the Sidemen, a prominent British creator group.
KSI Biography Table
| Detail | Information |
|---|---|
| Full Name | Olajide Olayinka Williams Olatunji |
| Date of Birth | June 19, 1993 |
| Age | 33 years old as of August 27, 2026 |
| Birthplace | London, England |
| Nationality | British |
| Profession | YouTuber, musician, entertainer, boxer |
| Education | Berkhamsted School |
| Years Active | Since the late 2000s |
| Known For | YouTube, gaming, the Sidemen, music, boxing |
| Major Achievements | UK chart success, major YouTube career, Sidemen co-founder, boxing victories |
| Estimated Net Worth | Not included because reliable current figures vary substantially |
Main Article
How Old Is KSI?
KSI is 33 years old as of August 27, 2026.
He was born on June 19, 1993, so his 33rd birthday was on June 19, 2026. His age changes each year on that date.
For readers searching specifically for KSI age, the basic calculation is:
2026 − 1993 = 33
Because his birthday has already occurred in 2026, his current age is 33.
When Is KSI’s Birthday?
KSI’s birthday is June 19.
His date of birth is June 19, 1993. Multiple biographical and music-industry sources identify June 19, 1993, as his birth date.
This also means KSI’s zodiac sign is Gemini, since June 19 falls within the commonly used Gemini date range.
What Is KSI’s Real Name?
KSI’s full name is Olajide Olayinka Williams Olatunji.
He is also commonly referred to as JJ or Jide. His professional identity, however, is primarily associated with the name KSI.
The name KSI became closely associated with his online career during his early gaming-content years.
Where Was KSI Born?
KSI was born in London, England, on June 19, 1993. He was raised in Watford, Hertfordshire, which became an important part of his early life.
Although London is generally listed as his birthplace, some biographical sources identify Watford in connection with his birth. The most consistent broader record lists London as the birthplace and Watford as the place where he was raised.
KSI’s family has Nigerian Yoruba heritage, and his father was born in Ibadan, Nigeria.
What Was KSI Like Before Fame?
KSI’s rise to fame began with online gaming content.
He became particularly recognizable through videos involving the FIFA video game series. His energetic personality, commentary style, humor, and distinctive presentation helped his videos gain attention on YouTube.
His online career eventually expanded beyond gaming. Rather than remaining focused on one category, KSI experimented with:
- Comedy and entertainment videos
- Vlogs
- Music
- Boxing
- Collaborative creator content
- Business ventures
- Television and other entertainment projects
That willingness to move between industries has been an important part of his career.
Where Did KSI Go to School?
KSI attended Berkhamsted School in Hertfordshire. He also attended Reddiford School earlier in his education.
During his school years, he met Simon Minter, who later became known online as Miniminter and became one of his fellow Sidemen members.
KSI did not attend university. Forbes lists his education as a Bachelor of Arts/Science equivalent entry with the note that he never went to university, reflecting his decision to pursue his growing online career instead.
When Did KSI Start YouTube?
KSI’s YouTube career began in the late 2000s, when he started creating gaming-related videos.
His early content centered heavily on FIFA commentary and gameplay. According to the Official Charts, he originally built his audience through his KSIOlajideBT channel and later expanded his content considerably.
The evolution of his career can be broadly viewed in stages:
- Gaming and commentary — Building his initial YouTube audience.
- Entertainment and comedy — Expanding beyond gaming.
- Sidemen — Collaborating with other major British creators.
- Music — Establishing a serious recording career.
- Boxing — Becoming a major figure in influencer boxing.
- Business and television — Expanding his public profile beyond digital content.
This diversification is one reason KSI remains relevant more than a decade after his initial rise.
KSI and the Sidemen
KSI is one of the founding members of the Sidemen, a British creator group established in 2013.
The original group included KSI, Miniminter, Zerkaa, TBJZL, Behzinga, Vikkstar123, and later Wroetoshaw.
The Sidemen became known for collaborative videos, challenges, gaming content, entertainment projects, and large-scale productions.
KSI’s involvement with the group helped him transition from being primarily recognized as an individual YouTube creator to becoming part of one of the most recognizable creator collectives in the UK.
KSI’s Music Career
Music became another major part of KSI’s professional identity.
He released “Lamborghini” with P Money in 2015, and the song reached No. 30 on the UK Singles Chart. His debut EP, Keep Up, followed in 2016.
His music career later developed into full-length albums and collaborations.
Two particularly notable releases are:
- Dissimulation — Released in 2020 and reached No. 2 on the UK Albums Chart.
- All Over the Place — Released in 2021 and reached No. 1 on the UK Albums Chart.
This chart success demonstrated that KSI’s musical career had developed beyond occasional internet releases.
KSI’s Boxing Career
Boxing is another major part of KSI’s public career.
His move into boxing attracted considerable attention because it brought together his large online audience and traditional combat-sports entertainment.
One of his best-known rivalries was with Logan Paul. Their first boxing match in 2018 ended in a draw, while KSI won their professional rematch in 2019.
KSI later became involved in Misfits Boxing, further connecting his career to influencer and crossover boxing.
His boxing activities helped establish him as more than a conventional YouTube personality and introduced him to audiences who may not have followed his earlier gaming content.
KSI’s Career Beyond YouTube
KSI’s career has developed across several entertainment industries.
His professional activities have included:
- Digital content creation
- Music
- Boxing
- Television
- Business
- Brand collaborations
- Group entertainment projects
Forbes has described him as a British YouTuber who moved into music and boxing and has also highlighted his involvement with the Sidemen and business ventures.
This broad career explains why searches for KSI today often involve much more than his age or YouTube history.
How Old Was KSI When He Started YouTube?
KSI began building his YouTube career as a teenager.
Because his birth date is June 19, 1993, and his early online activity dates to the late 2000s, he was approximately 15 to 16 years old when he began establishing his presence online.
This is one of the more interesting aspects of his story. His career developed from a teenage gaming hobby into a professional entertainment business spanning multiple industries.
How Has KSI’s Career Changed With Age?
KSI’s career is a useful example of how online creators can evolve over time.
In his teenage years and early twenties, gaming and YouTube were central to his public identity. As he became older, he increasingly explored music, boxing, business, and mainstream entertainment.
A simplified timeline looks like this:
| Period | Career Focus |
|---|---|
| Late 2000s | Gaming and early YouTube |
| Early 2010s | YouTube growth and collaborations |
| 2013 onward | Sidemen |
| 2015 onward | Music releases |
| 2018–2019 | Major boxing events |
| 2020–2021 | Album releases and chart success |
| 2020s | Boxing, business, entertainment and broader media |
This progression shows why simply knowing KSI’s age does not tell the whole story. His career has changed substantially as he has moved from teenage content creator to established entertainer.
KSI’s Brother Deji
KSI’s younger brother is Deji Olatunji, who is also known for creating online content and participating in boxing.
The brothers have both built significant online audiences and have also competed in boxing.
Their shared connection to YouTube and combat sports has made the Olatunji family particularly recognizable within the creator community.
Is KSI Still Active?
Yes. KSI remains active in entertainment and has continued to work across digital media, music, boxing-related projects, and television.
His career is no longer limited to the gaming content that first made him famous. His continuing activity across different areas is a major reason searches for his biography, age, career, and personal background remain popular.
What Is KSI Best Known For?
KSI is best known for several interconnected parts of his career rather than one single achievement.
YouTube
His original breakthrough came from gaming and commentary videos, particularly FIFA content.
The Sidemen
He is one of the founding members of the Sidemen, a major British creator group.
Music
KSI has released multiple projects and achieved major UK chart success, including a No. 1 album with All Over the Place.
Boxing
His fights with Logan Paul and later involvement with Misfits Boxing became significant parts of his public career.
Together, these areas explain KSI’s unusual career trajectory from gaming creator to multi-industry entertainer.
Frequently Asked Questions
How old is KSI?
KSI is 33 years old as of August 27, 2026. He was born on June 19, 1993.
When is KSI’s birthday?
KSI’s birthday is June 19. His full date of birth is June 19, 1993.
What is KSI’s real name?
KSI’s real name is Olajide Olayinka Williams Olatunji. He is also commonly known as JJ or Jide.
Where was KSI born?
KSI was born in London, England. He was raised in Watford, Hertfordshire.
What is KSI famous for?
KSI first became famous through YouTube gaming and commentary, particularly FIFA content. He later became known for the Sidemen, music, boxing, and other entertainment ventures.
Is KSI part of the Sidemen?
Yes. KSI is one of the founding members of the Sidemen, which was formed in 2013.
Does KSI make music?
Yes. KSI has released singles, EPs, and studio albums. His albums Dissimulation and All Over the Place both achieved significant UK chart success, with All Over the Place reaching No. 1.
Did KSI fight Logan Paul?
Yes. KSI fought Logan Paul in 2018, with their first fight ending in a draw. KSI won their professional rematch in 2019.
Conclusion
So, how old is KSI? As of August 27, 2026, KSI is 33 years old, having been born on June 19, 1993, in London, England.
His age is only one part of a much larger story. KSI began building an audience as a teenage gaming creator and eventually developed into a multi-industry entertainer involved in YouTube, the Sidemen, music, boxing, business, and television.
His career demonstrates how an online creator can continually expand into new fields while maintaining a strong connection with the audience that supported his earliest work.
