Elon Musk promised to donate millions in a fundraising effort for St. Jude's Children's Research Hospital.
Musk's SpaceX company set the goal for Inspiration4 to be a spaceflight. It was designed to raise $200 million.
Musk tweeted, "Count me in for $50M," on Saturday.
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Elon Musk pledged to donate $50 million for SpaceX's Inspiration4 fundraising campaign for St. Jude Children's Research Hospital.
Musk tweeted, "Count me in for $50M," upon Saturday's crew's return to Earth.
Inspiration4's main objective was to raise $200,000,000 for St. Jude. One of the crew members is a physician assistant.
Before Musk pledged his support, the fundraiser had already raised $160 million.
Wednesday night, NASA's Kennedy Space Center in Florida launched the historic Insipiration4.
It was manned by four people: Jared Isaacman (a billionaire businessman); Hayley Arceneaux (a physician assistant, childhood cancer survivor); Chris Sembroski (a veteran of the Air Force); and Dr. Sian Propctor, a geoscientist, and science communication specialist.
Isaacman, the commander of the spaceflight mission, donated $100 million for St. Jude. CNBC reported that the mission had already raised $60.2 million more than Musk's pledge, bringing the total to over $210 million.
The crew thanked Musk for his generosity and expressed their appreciation via Twitter.
"This brought tears to my eyes. Thank you @elonmusk, for your generous donation towards our $200 million fundraising goal for @StJude !!!" said Arceneaux.
Insider's Kate Duffy reported that the crew will sell items taken on the three-day journey around the Earth in order to raise funds for the hospital. They include artwork and NFTs, as well as a ukulele.