MrBeast, the worldâs most popular YouTuber, has announced in a loved-up social media post that he got down on one knee and asked fellow content creator Thea Booysen to marry him on Christmas Day. âYa boy did a thing,â MrBeast, real name Jimmy Donaldson, captioned an Instagram post that showed him and the 27-year-old from Cape Town, South Africa, wearing matching festive sweaters. âMy family flew out from South Africa for Christmas and we were going to do Christmas in our house so both families were here. We were opening presents, and then for the very last present he asked me to close my eyes because it was a surprise,â Booysen told People magazine. Donaldson told the publication he âintentionally dropped a large box to make noise before presenting the real giftâ containing the ring to Booysen. âI went down on a knee and proposed,â he added. Booysen said she âof course said yesâ and was âextremely excited.â Congrats!