The Dancing With the Stars season 34 partnerships were frequently changing ahead of the Wednesday, September 3, cast reveal, according to show cohost Alfonso Ribeiro. "Typically, once we have a list of the pros that are gonna be on, we then, at some point, we'll get the opportunity to hear who's gonna be [on the show]. But it's never final, right?" Ribeiro, 53, exclusively told Us Weekly on Wednesday. "It's ever-changing, and there were some pairings that were different three weeks ago.