MrBeast, born Jimmy Donaldson, is an American YouTuber, philanthropist, and entrepreneur. Known for his elaborate stunts and philanthropy, he has amassed over 100 million subscribers on YouTube. MrBeast's videos often feature challenges, giveaways, and social experiments, with a focus on entertainment and making a positive impact on the world. He has donated millions of dollars to various charities and causes, including planting trees, feeding the hungry, and supporting veterans.