How you know her:Braxton is a Grammy-nominated singer who starred with her sisters on the reality show Braxton Family Values. She currently co-hosts the talk show The Real.

Partner: Valentin Chmerkovskiy

How you know him: The eccentric actor is best known for his work in action films including Lethal Weapon, Point Break and Under Siege. He has also appeared on Celebrity Rehab with Dr. Drew, Celebrity Apprentice (twice), and Celebrity Big Brother in the U.K., which he won in 2014.

Partner: Anna Trebunskaya

How you know him: Carter rose to fame in the 1990s as the youngest member of the Backstreet Boys, and later released two solo albums.

Partner: Sharna Burgess

How you know her: Deen is a celebrity chef and cooking show host known for her Southern recipes. However, lately, she's been in the news for more controversial topics, including using racial epithets.

Partner: Louis van Amstel

How you know him: Espinoza is a jockey who won the Triple Crown this year (with victories at the Kentucky Derby, the Preakness Stakes and the Belmont Stakes) atop American Pharoah. He also won the Kentucky Derby with War Emblem in 2002 and California Chrome in 2014.

Partner: Karina Smirnoff

How you know him: Grammer's "Honey, I'm Good" is a current radio staple that has cracked the Top 10 of Billboard's Hot 100.

Partner: Allison Holker

How you know him: The 15-year-old is a celebrity thanks to the number of followers he has on the video- and photo-based social media platforms Vine and Instagram.

Partner: Emma Slater

How you know her: Irwin is the 17-year-old daughter of the late Steve Irwin (a.k.a. The Crocodile Hunter). A wildlife enthusiast and conservationist in her own right, Bindi has followed in her father's footsteps and starred in a number of nature-themed TV shows and documentaries.

Partner: Derek Hough

How you know her: The legendary songwriter (and 10-time Grammy winner) is known for hits as both a solo artist and frontwoman of the group Rufus, including "Tell Me Something Good," "I'm Every Woman" and "Ain't Nobody."

Partner: Keo Motsepe

How you know her: PenaVega is a child star best known as Carmen Cortez in the Spy Kids movies and also starred in the ABC Family series Ruby & The Rockits. Her husband Carlos is also competing.

Partner: Mark Ballas

How you know him: As Carlos Garcia on Nickelodeon's Big Time Rush (as well as a member of the band that spawned from the TV show). He'll be competing against his wife, Alexa, this season.

Partner: Witney Carson

How you know him: You might not know him by name, but Skarlatos is one of three Americans who subdued a gunman on a train that was traveling from Amsterdam to Paris just last month. French authorities credit Skarlatos, an Oregon National Guardsman, and his friends with preventing a massacre.

Partner: Lindsay Arnold

How you know her: Zolciak was one of the original cast members on Real Housewives of Atlanta, and also starred in the spin-off Don't Be Tardy ..., which followed her as she planned her wedding to NFL player Kroy Biermann.

Partner: Tony Dovolani