The complete 'Dancing with the Stars' lineup of professional dancer-celebrity pairs has been announced. Not only will fan favorites Karina Smirnoff and Maksim Chmerkovskiy be returning, but new pro dancer Anna Demidova will also be gracing this season's stage. Rehearsals are now underway for all 16 couples, who will hit the ballroom floor on September 21 for the season 9 premiere on ABC. See the 'Dancing' pairs >>

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Who Will Be 'Dancing With the Stars'?
Dancer: Donny Osmond
You know him from ... The Osmond family
Partner: Kym Johnson
You know her as ... The Season 4 runner-up with Joey Fatone.
WireImage / Getty Images
WireImage / Getty Images

Dancing With The Stars' Cast

    Dancer: Donny Osmond
    You know him from ... The Osmond family
    Partner: Kym Johnson
    You know her as ... The Season 4 runner-up with Joey Fatone.

    WireImage / Getty Images

    Dancer: Tom Delay
    You know him as ... A former U.S. congressman who violated campaign finance laws
    Partner: Cheryl Burke
    You know her as ... the first two-time champ on the show with Drew Lachey and Emmitt Smith.

    Getty Images / FilmMagic

    Dancer: Mark Dacascos
    You know him from ... 'Iron Chef America'
    Partner: Lacey Schwimmer
    You know her as ...Lance Bass' partner. The two finished in 3rd place during the 7th season.

    Chris Chavira, ABC

    Dancer: Kelly Osbourne
    You know her from ... 'The Osbournes'
    Partner: Louis Van Amstel
    You know him as ... The professional dancer with Priscilla Presley during Season 6.

    Getty Images

    Dancer: Ashley Hamilton
    You know him as .... The son of George Hamilton and ex-husband of Shannon Doherty
    Partner: Edyta Sliwinska
    You know her as .... The profession dancer alongside contestants Joey Lawrence and Evander Holyfield.

    Mitch Haddad, ABC

    Dancer: Kathy Ireland
    You know her from ... Her modeling career, 'Naked Gun'
    Partner: Tony Dovolani
    You know him from ... Season 8, as he partnered up with 'The Bachelor' star Melissa Rycroft.

    Getty Images

    Dancer: Chuck Lidell
    You know him from ... The UFC
    Partner: Anna Trebunskaya
    You know her from ...Season 2 partnering with football star Jerry Rice.

    Harper Smith, ABC

    Dancer: Macy Gray
    You know her from ... Her albums
    Partner: Jonathan Roberts
    You know him as...The first eliminated with Monica Seles and Belinda Carlisle.

    WireImage

    Dancer: Aaron Carter
    You know him from ... His solo career and being in the middle of Hilary Duff and Lindsay Lohan
    Partner: Karina Smirnoff
    You know her as ...The dancer with Mario Lopez, Bill Ray Cyrus and Apple Inc. co-founder Steve Wozniak.

    Harper Smith, ABC

    Dancer: Natalie Coughlin
    You know her from ... The Olympic pool
    Partner: Alec Mazo
    You know him from ... The Season 1 winner with partner, Kelly Monaco.

    Getty Images / FilmMagic