World's richest YouTuber Jimmy Donaldson, better known as 'MrBeast', proposed to his longtime girlfriend Thea Booysen on Christmas Day, the YouTuber revealed in an Instagram post. The 26-year-old YouTuber and his girlfriend got engaged at home surrounded by their families. The couple are planning to get married on an island. According to Forbes, MrBeast earned $85 million in 2024.