Topuria (15-0) won his title with a brutal knockout of Alexander Volkanovski at UFC 298 in February. The win not only improved the 27-year-old fighter's unblemished record, but also extended his winning streak in the promotion to seven straight.
Holloway (26-7) claimed the BMF belt by knocking out former interim lightweight champion Justin Gaethje in the co-main event of UFC 300 in April. That performance marked his first foray into the 155-pound weight class since losing to Dustin Puryear on points in 2019.
White also announced three more high-profile fights at the UFC 308 show, as Robert Whittaker will battle Hamzat Chimaev, Cyril Gawn will rematch Alexander Volkov, and Magomed Ancalaev will test the mettle of Aleksandar Rakic.