They're amongst the toughest sports stars in the world - taking part in brutal fights in packed stadiums and watched by millions on television.
And the leading lights of the Mixed Martial Arts (MMA) world can earn millions of dollars with their talent.
Add in money-spinning fights against big name boxers, advertising and sponsorship deals, and shrewd investments, and these fearsome warriors can become fabulously wealthy.
Here are the top 10 MMA stars in the world in 2024, according to CelebrityNetWorth.
5. Tito Ortiz
American MMA fighter Tito Ortiz is a former Ultimate Fighting Championship Light Heavyweight Champion and was one of the early stars of the sport. He's bolstered his fortune post-retirement by founding his own MMA equipment and clothing line called Punishment Athletics. His net worth is around $20 million. | Getty Images
6. Fedor Emelianenko
Widely considered the best MMA fighter of the 2000s, Russia's Fedor Emelianenko was the PRIDE Heavyweight Champion from 2003-2007. He's also a four-time combat sambo world champion, a seven-time combat sambo national champion, and two-time Russian national judo bronze medalist. His successful has seen him amass a fortune of around $18 million. | POOL/AFP via Getty Images
7. Wanderlei Silva
Brazilian fighter Wanderlei Silva competed in Japan's Pride Fighting Championships and the Ultimate Fighting Championship (UFC) and holds the record for the most wins, knockouts, title defenses and longest winning streak in PRIDE history. This year will see him inducted into the pioneer wing of the UFC Hall of Fame. His net worth is estimated at $18 million. | Getty Images
8. Francis Ngannou
Cameroonian MMA star Francis Ngannou is currently signed to the Professional Fighters League (PFL) and has also fought in Ultimate Fighting Championship (UFC) where he was Heavyweight Champion. His recent fight against Anthony Joshua helped bolster his bank balance, meaning he's worth around $15 million. | Getty Images