Rousey (11-0) tipped the scales at the maximum limit of 135 pounds during a UFC 190 official weigh-in on Friday in Rio de Janeiro. Correia (9-0), who fights out of Natal, Brazil, weighed in at 134 pounds.
The bantamweight title fight headlines UFC 190, which will take place at HSBC Arena. It marks the first time Rousey will defend her title in a locale other than her native Southern California or Las Vegas. Despite a Brazilian challenger, the Rio de Janeiro crowd has had a more positive reaction to Rousey all week.
"Thank you guys for all the noise and passion," Rousey told the Brazilian fans. "You're not going to be disappointed. I'm going to give you the best women's title fight you've ever seen, the most devastating loss you've ever seen for Bethe and my best win. I can't wait for tomorrow."
During their final staredown, shortly after the weigh-in, Correia screamed into the face of Rousey, which she's done previously. Correia, 32, is 3-0 in the UFC and has two career knockouts.
"I've dreamed about this moment for a long time," Correia said through a translator. "I think Brazilians need a female champion. I know a lot of people aren't rooting for me, but I'm going to fight for all of Brazil."
Rousey is a 15-to-1 betting favorite, the highest she's ever been going into a UFC title defense. She's said the fight has turned personal after Correia made remarks earlier this year regarding Rousey "killing herself" if she lost. Rousey's father took his own life after a sledding accident when she was 8 years old.
All 26 fighters scheduled to compete at UFC 190 made weight, with the exception of middleweight Clint Hester. Hester was given one hour to lose less than one pound to make weight. In the co-main event, Mauricio Rua (22-10) and Antonio Rogerio Nogueira (21-6) each weighed in at 206 pounds for a light heavyweight fight. Heavyweight Antonio Rodrigo Nogueira (34-9-1) came in at 240 pounds, and his opponent, Stefan Struve (25-7), weighed the maximum amount of 265 pounds.