Each fighter successfully made weight at the official UFC weigh-in Friday. The bantamweight bout is set to headline the TUF Finale, which takes place Saturday at The Mandalay Bay Events Center.
Faber (27-6) weighed in at 136 pounds. Jorgensen (16-6) came in at 135.5.
The two have been friends for more than 10 years. Jorgensen even credits his upcoming opponent for getting him into mixed martial arts and admits his son is a Faber fan.
None of that, however, will matter come Saturday.
"We're friends," Jorgensen said. "On Saturday, that ends and we'll go in there and battle for 25 minutes. Then we'll go to our after-parties together, and it all goes back to the way it was before."
UFC president Dana White told ESPN.com he hasn't seen anything like this since the show's very first season.
"(Saturday) is the most talked about, anticipated UFC debut from The Ultimate Fighter since Forrest Griffin," White said.
Hall (7-2) weighed in at 185 pounds. Gastelum came in at the 186-pound limit.
All but one of the 24 fighters set to compete at the TUF Finale made weight. Featherweight Maximo Blanco came in 1 pound heavy for his undercard bout against Sam Sicilia. He was given an extra hour to cut the weight.
In the second female fight in UFC history, former Strikeforce champion Miesha Tate faces Cat Zingano. The winner will coach against UFC bantamweight champion Ronda Rousey in the next season of TUF. Tate (13-3) came in at 135.5 pounds. Zingano weighed 136.