Donaldson has built a massive following over the years by creating viral videos and staging stunts for his YouTube channel.

These have snowballed into huge high-stakes challenges where he gives away large sums of money to strangers.

He also helped create the Prime Video reality competition series, Beast Games, which was inspired by the hit Netflix show Squid Game.

It follows contestants as they play a series of games in the hope of winning a $5m (£3.7m) prize pot.

Booysen, originally from South Africa, also has her own channel on the site, TheaBeasty, with nearly 140,000 subscribers.

The 28-year-old also streams games on Twitch and is a published author.

Being the most successful YouTuber has not come without controversy for Donaldson.

In April, MrBeast’s media company, Beast Industries, was sued by a former employee over claims of sexual harassment and workplace gender bias.

He has also faced legal action by contestants in the Beast Games on how they were treated, as well as claims his viral giveaways and competitions are staged and pre-planned.