Jimmy Donaldson (born May 7, 1998), known online as MrBeast, is an American YouTuber, philanthropist, and entrepreneur famous for large-scale challenge videos and grand giveaways. He launched his channel in 2012, gaining global fame through endurance tests and record-setting stunts. With over 200 million subscribers, he pioneered viral formats like “Last To Leave” challenges and mega giveaways. Beyond entertainment, he co-founded Beast Philanthropy and the snack brand Feastables, using his platform for charitable impact.