NEW YORK -- Busy cancer patient Valerie Harper leads a class of 12 amateur hoofers in the upcoming 17th season of "Dancing With the Stars."
The cast was revealed Wednesday on ABC's "Good Morning America." For a show that has reached an increasingly older audience, ABC added an injection of youth with reality stars Nicole "Snooki" Polizzi of "Jersey Shore" and Ozzy's kid Jack Osbourne.
Harper has defied odds with her survival since being diagnosed earlier this year with brain cancer. She recently filmed a movie role and joined a Nick at Nite reunion of "The Mary Tyler Moore" cast.
A brain scan last month showed improvement for the 74-year-old former sitcom star, whose doctors say her cancer is getting close to remission. She will have her next scan in October.
Harper said that so far, she's not taking any precautions when she's rehearsing.
"He (pro partner Tristan MacManus) says, 'Do you want to get water?' Which is great because I don't drink enough water but (that's) not to do with the cancer ... (it's) not an impediment to dancing and I just try to stay healthy and continue to lose weight so I look halfway decent in the costumes," she said with a laugh.
Harper said of her decision to join the show: "There's a (Lee Ann Womack) country song (with the lyrics) 'when you get the choice you sit it out or dance/ I hope you dance.'"
Other contestants on the new season of "Dancing," which premieres Sept. 16, are Bill Nye, the "Science Guy"; "Pretty Little Liars" actor Brant Daugherty; former NFL wide receiver Keyshawn Johnson; singer-actress Christina Milian; actress Elizabeth Berkley; "High School Musical" actor Corbin Bleu; "Glee" actress Amber Riley; country comic Bill Engvall; and "King of Queens" actress Leah Remini.
The celebrities and their pro partners, minus Remini and dancer Tony Dovolani, all made the trek to New York to promote the show's return.
Although still a ratings winner for ABC in its 16th season, the celebrity dancing contest has seen its overall audience decline and grow older, an issue for networks that get higher commercial ad rates for younger viewers.
"Dancing" will now air once a week on Mondays rather than Mondays and Tuesdays.
"One day a week is fine with me! I need more time to rehearse," said Milian.
"You get all the action in one night. It's all killer, no filler," said her partner, Mark Ballas.
And with younger contestants like Bleu, Daugherty and Riley, the show might skew to a more youthful demo.
There are changes behind the scenes, too. There are new professional dancers, plucked from the show's troupe. Contestants are starting off with a four-hour rehearsal limit per day that will hopefully cut down on injuries and fatigue.
Meanwhile People reported pro Anna Trebunskaya will not return for this season because she's pregnant with her first child,
The professional dancer, 32, divorced fellow "DWTS" pro Jonathan Roberts in October 2012. She is four months along in her pregnancy, People confirmed. Trebunskaya has not released the name of the baby's father.
The pros were mixed on whether they liked the time constraint and said it could change as the season goes on and they have to do more than one dance per show.
"Now that we have a restricted time, I feel like we're gonna get more done," said Derek Hough.
"That I don't like," said Karina Smirnoff. "Four hours is tough."
"Every single time that last hour (of rehearsal) ends up coming up with both of us going, 'Oh no. It's not there yet,'" said her partner Bleu.
Smirnoff said she believes as the season progresses, the rehearsals might get longer.
The one thing the audience likely won't see is twerking, a dance that's been in the spotlight thanks to Miley Cyrus' performance at the MTV Video Music Awards.
"I don't think that's relevant to anything that has to do with class," said dancer Val Chmerkovskiy. "I keep it classy. I want my partners to keep it classy. Twerking is not on the menu."