The Season 20 winners of “Dancing with the Stars” might have just been revealed but fans of the ABC series are already wondering which celebrities will be cast in Season 21 installment of the hit competition, which will premiere in the fall. That gives viewers more than enough time to speculate what red carpet contestants could possibly be going toe-to-toe for the Season 21 title of “DWTS” champion.

And it looks like the casting theorization has already begun! Check out the Season 21 cast predictions and who we want to see compete on the upcoming installment of “DWTS” below:

Bruce Jenner

A source revealed to Hollywood Life that it’s quite possible Bruce Jenner, who confirmed in April that he is transgender and currently using male pronouns until further notice, may dazzle audiences with his fancy foot moves during the new season of “DWTS.” Although we’d love to see the “Keeping Up with the Kardashian” star bust a move on the ballroom floor, we’re a bit skeptical that the busy Olympian will participate in the upcoming installment.

Hollywood Life dished that “DWTS” producers are attempting to persuade Jenner to participate on the show by allowing the athlete to Foxtrot with the professional dancer of his choosing.

“Julianne [Hough], Derek [Hough] and Mark [Ballas] are all vying to dance with Bruce if he signs up for the show,” a source revealed to the outlet. “The producers have told Bruce this to sweeten the deal that if he comes onto the show, he will be given one of the best dancers they have.”

Rob Kardashian

Jenner isn’t the only “KUWTK” star rumored to be appearing on Season 21 of “DWTS.” According to Radar Online, Rob Kardashian may make a “one-night-only” debut on the upcoming installment of the show.

The reality star, who finished in second place during Season 13 of the dancing series, has “been given an open invitation to visit the show,” a source divulged to Radar Online. But will Kardashian take the bait?

Britt Nilsson

Nilsson may have lost her chance at love while competing on Season 19 of the “Bachelor,” and once again when she was eliminated from the 2015 season of “The Bachelorette” on Tuesday, but maybe this time the ABC star can go home a winner if she is cast on Season 21 of “DWTS.”

“DWTS” is no stranger to casting Bachelor Nation alums on the series. “Bachelor/Bachelorette” stars from Melissa Rycroft to Chris Soules and even Sean Lowe have danced their hearts out on the show. So why wouldn’t Nilsson be offered the opportunity to showcase her talent on the ballroom floor? Besides, maybe Nilsson could even find her soulmate on the show. Just look at Robert Herjavec and Kym Johnson!

Keke Palmer

We’d love to see this rising star bust a move on “Dancing with the Stars.” Not only has the energetic actress, who will be starring in the upcoming Fox horror series “Scream Queens,” proved she knows how to shake it, but Palmer also has the star quality “DWTS” craves to draw in viewers.

Stephanie Courtney

Does this name sound familiar? No? Well that’s probably because you most likely know Courtney by her alter ego: Flo the Progressive Insurance agent.

This is personally our favorite cast theory because we can picture the upbeat store employee winning the heart's of "DWTS" fans with her overzealous attitude and perky demeanor.

Len Goodman

Len Goodman, who has been a judge on “DWTS” since 2004, previously revealed that Season 20 would be hit last. But it looks like the beloved judge isn’t quite through with the long-running series -- and we couldn't be happier!

"The truth is there is still a chance that Len will be around for 21, either as a part of, a small part, a big part or a whole part of the season," the “DWTS” executive producer Rob Wade told E! News in January. “I don't know how we'd use him, but he's very open to it. I spoke to Len two days ago. And then for Season 22, the spring, he's very up for coming back. And if we can come to an agreement, he absolutely wants to come back. "

It was teased once again during the Season 20 finale that Goodman may stick around for another installment of the dance series.

Who would you like to see on Season 21 of "Dancing with the Stars" when the ABC series returns in the fall?