Reports revealed that Hayes Grier will be joining in the much awaited Season 21 of "Dancing with the Stars." Meanwhile, there are rumors that another married couple will have a face-off at the dance floor. Find out who.

The 15-year old online sensation was the latest celebrity to announce his participation, according to PopSugar.

Aside from the young internet celeb, a well known couple is said to be competing against each other on the upcoming show.

Alexa and Carlos PenaVega will be parting for a while as rivals at the dance floor.

"He literally rehearses right next door. So he'll walk over to me and he'll just give me a kiss," the wife told Entertainment Online. "It's so good, though, because he literally rehearses right next door," she added.

The couple got married at the Grand Velas Riviera Nayarit in Puerto Vallarta, Mexico on January 2014.

Notably, Alexa and Carlos were the second couple to join the dance show. On season 8, singer Jewel and then-husband Ty Murray went on the dance floor as well. But Jewel was not able to continue due to injury. She was replaced by Playboy model Holly Madison.

More than Griers and the PenaVega couples, some of the well-known celebrities are set to join the show. Backstreet Boy's Nick Carter, the late Steve Irwin's daughter Bindi and Triple Crown jockey Victor Espinoza were recently declared.

Meanwhile, "The Real Housewives of Atlanta" Kim Zolciak, Chef Paula Deen, 90's singer Chaka Khan and "The Bachelorette" runner-up Nick Viall are rumored to be participating as well, Us Magazine noted.

The ABC's reality dance competition is going to unveil the casts one by one until Sept. 2, with the final line-up that will be shown on "Good Morning America."

"Dancing With the Stars" Season 21 premieres Sept. 14 at 8 p.m. ET on ABC.