The most highly anticipated comeback in UFC history is upon us.

Ronda Rousey will return after more than a year away to challenge champion Amanda Nunes at UFC 207 on Dec. 30 in Las Vegas, UFC president Dana White announced Wednesday on "The Herd" with Colin Cowherd.

Rousey (12-1) has been out of the public eye since a second-round knockout loss to Holly Holm at UFC 193 last November. It was her first career loss and a devastating one. The UFC women's bantamweight title changed hands that night in Australia and has been around the waist of two other women since with Nunes being the latest.

Rousey, 29, is the biggest mainstream star the UFC has ever had, with multiple feature films under her belt, including "Entourage" and "Fast & Furious 7." "Rowdy" took time off in 2016 to recover from the loss, but to also work on her second career in Hollywood. Rousey, a Los Angeles resident, admitted on an episode of "Ellen" earlier this year that she had suicidal thoughts after losing to Holm.

Before the defeat, Rousey was known for nearly unprecedented dominance. She won each of her previous four fights in 66 seconds or less and had finished every single opponent.

Nunes (13-4) won the title by beating Miesha Tate by first-round submission at UFC 200 in July. That was after Tate took the belt from Holm by fifth-round submission at UFC 196 back in March. Nunes, 28, has won four in a row in the UFC, with three of those coming via finish. She trains out of the prestigious American Top Team in Coconut Creek, Fla.

No other fights have been announced for UFC 207, which takes place at the new T-Mobile Arena in Las Vegas. UFC 200 and UFC 202 also took place at the T-Mobile Arena.

Watch: A look back at Rousey's shocking loss to Holm in her last fight