Spoiler alert! The cast of season 15's "Dancing With the Stars" is reported to be only celebrities that have been winners or finalists in past seasons of the show, according to the Daily News.

12 Contestants Officially Announced: See Who Will Dance for the Mirror Ball Trophy

Season 2 winner Drew Lachey and season nine winner Donny Osmond will return to try to win another mirrorball trophy, reclaiming their title as a DWTS champion, according to the paper. Other returning stars include Mel B, Mario Lopez and Gilles Marini, who narrowly lost to Olympic athlete Shawn Johnson.

The network will officially announce the entire cast lineup on Friday, July 27 but a source that spoke to the Daily News named most of the stars that will be on the show. The female celebrities coming onto the new season include Pamela Anderson, Maria Menounos and Stacey Keibler, the News reported on Thursday.

Twitter's DWTS Gossip posted on July 25 that season 15 will have 12 couples and hosts Tom Bergeron and Brooke Burke will announce 11 of the contestants, then giving three options for fans to choose as the 12th celebrity contender.

Bergeron tweeted: "Looking forward to Friday's DWTS All-Star Cast announcement. We'll be announcing all but one, then YOU have to get to work!"

Television star Carson Kressley is rumored to be one of the three options for the final spot, according to The Huffington Post. Season one's winner Kelly Monaco has also been reported hinting to the fact that she will need her fans to help her with something in the near future, according to fansite PureDWTS.com.

The 2012 DWTS All-Star season premieres September 24 on ABC.

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