The announcement was made as part of CBS unveiling its winter reality programming schedule, which includes the premiere of Survivor's 38th season and the second season of Celebrity Big Brother.
As previously revealed, The Amazing Race's next edition will feature a "reality clash" of strong competitors from past seasons of The Amazing Race, Big Brother and Survivor racing for the $1 million prize.
The Amazing Race announced in June it had begun filming its 31st season when the show's official Twitter account posted a video of Phil standing at the starting line in Hermosa Beach, CA.
The alleged identities of the teams had also leaked out at the time.
According to posts from spoiler sleuths citing eyewitness accounts on Reality Fan Forum's message board, The Amazing Race's Season 31 teams will be comprised of five former The Amazing Race teams, three teams of former Big Brother houseguests, and three teams of former Survivor castaways.
The veteran Racers from The Amazing Race will reportedly include Becca Droz and Floyd Pierce from Season 29, Tyler Oakley and Korey Kuhl from Season 28, and Leo Temory and Jamal Zadran from Season 23 and the show's All-Stars edition.
And teams coming from Survivor will reportedly include Rupert Boneham from Pearl Islands, All-Stars, Heroes vs. Villains, and Blood vs. Water and Laura Boneham from Blood vs. Water as well as Chris Hammons and Bret LaBelle from Survivor: Millennials vs. Gen X.