The American underdog, 34, sent an already wobbling Rousey to the canvas with a sweeping kick to the head, before pouncing upon her stricken opponent and forcing the referee to end the clash.
It improved Holm’s unbeaten record to 10-0, and ended Rousey’s own perfect card of 12 bouts without defeat.
Tokyo 2020 - 'She changed me as a person' - Amelie Morgan on coach Liz Kincaid after Tokyo bronze
"I had so much love and support. I thought, 'how could I not do this?'," Holm said afterwards.
"There was lots of blood, sweat and tears, but it sure was worth it. I'm trying to take this in, but this is crazy."
Tokyo 2020 - 'The girls absolutely smashed it' - Alice Kinsella on Team GB's epic gymnastics bronze!