An "All-Star" edition of the ABC competition show will bring back 12 former rivals including Pamela Anderson, Kirstie Alley and Bristol Palin.
Former 'NSync member Joey Fatone and gymnast Shawn Johnson will also be returning, ABC announced Friday.
Other contestants include:
-- "General Hospital" star Kelly Monaco.
-- Former 98 Degrees boy-band member Drew Lachey.
-- Super Bowl champ Emmitt Smith.
-- Indianapolis 500 winner Helio Castroneves.
-- Olympic medalist speed skater and Seattle native Apolo Anton Ohno.
-- "The Bachelor" star Melissa Rycroft.
-- Actor Gilles Marini.
In a break from the past, viewers can vote online for the 13th contestant from three former contestants including actors Kyle Massey and Sabrina Bryan and celebrity stylist Carson Kressley.
"This is about giving the viewers a treat, and breaking the rhythm of the show," said executive producer Conrad Green during a session of the Television Critics Association conference.
"Dancing" returns on ABC on Sept. 24.
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