"Good Morning America" went behind the scenes of the stars' final rehearsals before they tango and foxtrot their way into the ballroom.
"GMA" meteorologist Ginger Zee said she is up to the "huge challenge" of competing on "DWTS" while also doing her day job on "GMA" and being a new mom to her newborn son, Adrian.
"I love adventure," Zee said. "It's like any other new mom going back to work ... you wanna find yourself again."
"And I'm lucky," she added. "I've got support. I've got family friends, everybody that's making this not as difficult as it could be."
"Bob-bob," Sweetin said of the dancing pair's new word.
UFC champ Paige Vanzant predicts viewers will be surprised by what they see when she hits the ballroom.
"Everyone sees me as a fighter and identifies me as a tough girl," Vanzant said. "They're gonna see a girly different side of me ... sequins are a little different than MMA gloves."
Nyle DiMarco, winner of the final season of “America's Next Top Model,” is the first deaf male contestant to compete on “Dancing With the Stars.”
"It's a huge platform for me and an audience to help raise awareness for deaf people and their perspective on deaf culture," DiMarco said.
Season 22 of "Dancing with the Stars" premieres tonight at 8 p.m. ET on ABC.