The Orange County, Calif. native made her small screen debut on MTV’s The Hills in 2006.
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Audrina Patridge - Now
The aspiring actress, 25, landed small roles in Sorority Row and Into the Blue 2. She will dance opposite Tony Dovolani.
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Michael Bolton - Then
The crooner won a Grammy for his rendition of "When a Man Loves a Woman" in the early '90s. He went on to sell more than 53 million records worldwide.
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Michael Bolton - Now
The singer, 57, will partner up with Chelsie Hightower.
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Brandy - Then
The singer released her debut album two years before she landed the starring role on Moesha in 1996 (which ran for six seasons until 2001).
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Brandy - Now
The singer, 31, is looking forward to teaming up with dance pro Maksim Chmerkovskiy. "I know I'm never going to look as sexy as I will on this show," Brandy tells Us.
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Bristol Palin - Then
Vice Presidential nominee Sarah Palin's teenage daughter sent shockwaves through the nation when she gave birth to baby Tripp (with on-again, off-again boyfriend Levi Johnston) in 2008. She later became an advocate against teenage pregnancy.
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Bristol Palin - Now
The 19-year-old politician's daughter will dance with Mark Ballas. "I wanted to step outside of my comfort zone and have a good time," Palin tells Us.
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David Hasselhoff - Then
The actor starred on Knight Rider for several years in the '80s prior to his 11 year stint on Baywatch (which later became the most-watched show in the world). In addition to acting, Hasselhoff has also released 16 rock albums.
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David Hasselhoff - Now
The 58-year-old America's Got Talent judge will partner up with Kym Johnson.
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Florence Henderson - Then
The actress played the iconic role of Carol Brady in The Brady Bunch (1969 to 1974).
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Florence Henderson - Now
The actress, 76, will compete with dance pro Corky Ballas.
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Rick Fox - Then
The NBA star played for the Boston Celtics (1991–1997) and the L.A. Lakers (1997–2004). In addition to basketball, Fox also starred on TV shows such as Dirt (opposite Courteney Cox) and The Game (opposite Tia Mowry).
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Rick Fox - Now
The 41-year-old (who is currently dating actress Eliza Dushku) will dance alongside Cheryl Burke.
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Jennifer Grey - Then
The actress made a name for herself with roles in 1987's Dirty Dancing (opposite Patrick Swayze) and 1986's Ferris Bueller's Day Off (opposite Matthew Broderick).
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Jennifer Grey - Now
The 50-year-old actress will compete with dance pro Derek Hough. "I thought it would be a really great way to challenge myself, and show by example to my 8-year-old what it's like to watch mommy walk through her fears," Grey tells Us of her decision to compete.
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Kurt Warner - Then
In 1998, the quarterback was signed to St. Louis Rams. Throughout the next 12 years he played for a handful of other NFL teams, including the New York Giants and the Arizona Cardinals.
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Kurt Warner - Now
Warner retired from the NFL in January 2010. The 39-year-old ex-quarterback will compete with dance pro Anna Trebunskaya during DWTS.
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Kyle Massey - Then
Beginning in 2003, Massey played the role of Raven Symone's little brother on That's So Raven. In 2007, he began starring in the show's spinoff, Cory in the House.
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Kyle Massey - Now
Dance pro Lacey Schwimmer will team up with the 19-year-old actor.
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Margaret Cho - Then
The comedian starred in 1994's All American Girl, which was then touted as the first show prominently featuring an East Asian family in the U.S. After its cancellation the following year, Cho battled substance abuse issues.
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Margaret Cho - Now
The 41-year-old comedian (who currently stars on Drop Dead Diva) will dance alongside Louis van Amstel.
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The Situation - Then
The MTV reality star introduced his abs to the masses with 2009's Jersey Shore. Known for his vanity and hard-partying ways, the 28-year-old (real name: Mike Sorrentino) has already completed filming the show's third season.
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The Situation - Now
He'll pair up with dance pro Karina Smirnoff during DWTS, but his Jersey Shore castmate Snooki tells Us, "Mike is going to be terrible because he doesn't dance."
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