‘Dancing With the Stars’ Season 17 Cast Announced: Snooki, Keyshawn Johnson, Bill Nye the Science Guy to Compete for Mirror Ball Trophy (PHOTO)

The new stars to grace the dance floor for the new season of "Dancing With the Stars" was announced on "Good Morning America." The 12 celebrities were revealed in Times Square in New York City on the morning show.

Hosts Tom Bergeron and Brooks Burke-Charvet helped reveal the cast which will include "Jersey Shore" star Nicole "Snooki" Polizzi, actress Valerie Harper and former NFL star Keyshawn Johnson. Veteran and fan-favorite professional dancers Maksim Chmerkocskiy and Kym Johnson will not be returning this season and will be replaced by two new faces.

"I wish all the dancers and celebrities in season 17 nothing but love and success, and hope to see you all back on the dance floor for season 18," Johnson said in a statement to E! News.

For the first time since the show started, it will do away with the two nights a week show and will instead combine the performance and the results into a two-hour Monday night show.

"We really wanted to focus and event-ize 'Dancing With the Stars.' I know [executive producer] Conrad [Green] is having a whole lot of fun contracting a night on Monday that not only gives you the dances but the results," ABC boss Paul Lee said. "Effectively what we're doing is we're taking the votes from the judges and the votes from the audience and bringing them together at the end. Conrad has worked through a really interesting two hours. It builds to a climax at the end."

Each week the celebrities will perform challenging dance moves in hopes of advancing and winning the coveted Mirror Ball trophy.

Season 17 of "Dancing With the Stars" returns Monday, Sept. 16 at 8 p.m. on ABC.

Check out the full cast with their partners below"

* "Jersey Shore" star Nicole "Snooki" Polizzi and Sasha Farber

* Former NFL star Keyshawn Johnson and Sharna Burgess

* Actress Valerie Harper and Tristan MacManus

* "Pretty Little Liars" star Brant Daugherty and Peta Murgatroyd

* Singer Christina Milian and Mark Ballas

* Bill Nye the Science Guy and Tyne Stecklein

* "Saved by the Bell" star Elizabeth Berkley and Val Chmerkovskiy

* "High School Musical" star Corbin Bleu and Karina Smirnoff

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