Watch live as celebrities including Robert Downey, Jr., Gigi Hadid, Christina Aguilera, Anne Hathaway, Paris Hilton, Salma Hayek Pinault, Gal Gadot and Michelle Yeoh walk the red carpet in Santa Monica, Calif., alongside tech titans including Sam Altman, Jensen Huang and Bill Gates before the Breakthrough Prize ceremony honoring scientific and technological achievements. #breakthroughprize #samaltman #annehathaway #zoesaldana #billgates #parishilton ___ In this video ___ 0:00:00 start of