Brett Okamoto of ESPN first reported the bout.
Chookagian (14-4-0) has won three of her last six in the UFC, with those wins coming over Joanne Calderwood, Jennifer Maia and Antonina Shevchenko. Chookagian has previously challenged for the UFC women’s flyweight title, losing to Valentina Shevchenko at UFC 247. Chookagian has picked up 11 of 14 wins by way of decision, while also suffering two of four losses by decision.
Calvillo (9-1-1) has been undefeated since moving up to flyweight, defeating Jessica Eye by unanimous decision in the main event of UFC Fight Night: Eye vs. Calvillo. Calvillo has competed as both a flyweight and strawweight in the UFC, earning a 6-1-1 record in the promotion. Calvillo has competed 11 times as a professional MMA fighter and six of those bouts went the distance.
UFC 255 takes place on Saturday, November 21 from the UFC Apex in Las Vegas, Nevada with Deiveson Figueiredo and Alex Perez headlining. Fightful is providing live coverage of the event, which streams live on ESPN+ pay-per-view.