Who is KSI?

KSI (Olajide Olatunji) is a British YouTuber, musician, boxer, and entrepreneur who gained fame through his gaming videos and has since built a multifaceted career. He is a co-founder of the Sidemen, a popular YouTube group, and has ventured into music with successful rap albums.

In boxing, KSI has participated in high-profile matches, including a victory over Logan Paul in 2019. He also co-founded Misfits Boxing, a promotion company for influencer boxing events.​

KSI's Age & Birthday

Date of Birth: June 19, 1993

Age: 31 years old (as of 2025)

Zodiac Sign: Gemini​

KSI's Height & Physical Stats

Height: 6 feet 0 inches (183 cm)

Weight: Approximately 200 lbs (90.5 kg)

Reach: 76 inches (193 cm)

Stance: Orthodox​

KSI's Career & Businesses

YouTube Career: KSI began his YouTube journey in 2009, gaining popularity with FIFA gaming videos. As of January 2025, he has over 44 million subscribers and 14 billion video views across his three active YouTube channels.

Music Career: KSI transitioned into music, releasing rap albums that achieved commercial success. His music career has expanded his influence beyond YouTube.

Boxing Career: KSI's boxing record stands at 5 wins, 1 loss, and 1 draw, with 4 of his victories coming by knockout. He co-founded Misfits Boxing, a promotion company for influencer boxing events.

Business Ventures: KSI co-founded Prime Hydration with Logan Paul, a beverage brand that has gained significant popularity. He also owns XIX Vodka and is involved in Sidemen Clothing, contributing to his diverse business portfolio.

KSI's Net Worth

Estimated Net Worth (2025): $100 million.

Sources of Income: YouTube earnings, music sales, boxing matches, business ventures, and brand endorsements.​

KSI's Family & Personal Life

Family Background: KSI has a brother named Deji, known as Comedy Shorts Gamer, who is also a YouTube personality.

Personal Life: KSI has been open about his journey, including his experiences with fame and personal growth. He continues to engage with his audience through various platforms, sharing insights into his life and career.​

What’s KSI’s Dream?

KSI aims to continue expanding his influence across various entertainment sectors, leveraging his platform to inspire and entertain a global audience.