The highly anticipated superfight between UFC bantamweight champion TJ Dillashaw and flyweight champion Henry Cejudo is officially on.

The two fighters needed to check in under 125 pounds at Friday morning's UFC on ESPN+ 1 weigh-in, which is 10 pounds lighter than Dillashaw typically fight at during bantamweight competition. He came in at 124.6 this morning after a grueling weight cut that continued into the early hours of the morning on Friday.

Cejudo, who will put his flyweight title on the line this Saturday, took the scale moments later at 124.4 pounds, making the champion vs champion fight official. 

Cejudo (13-2) won the UFC's flyweight belt in August after upsetting longtime division champion Demetrious Johnson. Dillashaw (16-3) has won eight of his last nine fights, including consecutive victories against former bantamweight champ, Cody Garbrandt. 

UFC on ESPN+ 1 at the Barclays Center in Brooklyn will take place this Saturday, January 19. The event will mark the first live event of a five-year deal between the UFC and ESPN.

In addition to the Dillashaw vs Cejudo main event, the UFC on ESPN+ 1 main card will also feature Paige VanZant's return to the octagon as she takes on Rachael Ostovocih, as well as Greg Hardy vs Allen Crowder, Gregor Gillespie vs Yancey Medeiros, Joseph Benavidez vs Dustin Ortiz, and Glover Teixeira vs Karl Roberson.