Season 9 of "Dancing"
Donny Osmond became a teen idol as a member of The Osmonds and on the variety series "The Donny & Marie Show" which he co-hosted his sister, "DWTS" alum Marie Osmond. Since then, he has added game show host, author, Broadway and film roles to his resume. He danced with Kym Johnson.
Mya
Mya made her debut at the age of 18, when her self-titled first album yielded three Top 10 singles. In addition to releasing 5 albums, one of which went platinum and another gold, she starred in the film "Chicago." She is paired with Dmitri Chaplin.
Kelly Osbourne
Kelly Osbourne, daughter of rocker Ozzy Osbourne, is a singer and reality star who joined her family on the MTV series "The Osbournes." She also released two albums and hosted a weekly radio show in the U.K. Her dancing partner is Louis Van Amstel.
Joanna Krupa
Poland-born model and actress Joanna Krupa has starred in PETA's "I'd Rather Go Naked Than Wear Fur" campaign and has starred in roles on "CSI: Crime Scene Investigation" and "Las Vegas." In 2009, Maxim magazine named her one of the top 100 women in the world. She is paired up with Derek Hough.
Aaron Carter
Aaron Carter is a singer, actor and reality star. He has released four albums, appeared in roles on "7th Heaven" and "Lizzie Maguire" and starred in the reality show "House of Carters" with his brother, Backstreet Boy member Nick Carter, and their three sisters. He is paired with Karina Smirnoff.
Mark Dacascos
Mark Dacascos is an actor, trained martial artist and the host of the Food Network show "Iron Chef America." He's also starred in films such as "Cradle to the Grave," with Jet Li, and "Brotherhood of the Wolf." He is paired up with Lacey Schwimmer.
Michael Irvin
Regarded as one of the most successful wide receivers in the history of the NFL, former Dallas Cowboy Michael Irvin is a three-time Super Bowl champion and former broadcaster for ESPN's "NFL Countdown." The Hall-of-Fame inductee has also appeared in various television shows and films. He is paired with "Dancing" newcomer Anna Demidova.
Melissa Joan Hart
Melissa Joan Hart got her start as a young actress on "Clarissa Explains it All" and "Sabrina the Teenage Witch." She has also starred in the teen comedies "Can't Hardly Wait" and "Drive Me Crazy," along with other made-for-television roles. She is paired up with Mark Ballas.
Louie Vito
Professional snowboarder Louie Vito is among the U.S.' elite snowboarders favored to make the 2010 Olympic team. The 21-year-old turned pro in 2006 and has competed in multiple Winter X-Games competitions. He is also a two-time winner of the USSA Grand Prix Halfpipe Series. He is paired up with Chesie Hightower.
Natalie Coughlin
Swimmer Natalie Coughlin is the most decorated female athlete of both the 2008 Beijing and 2004 Athens Games. She has won a medal in every single Olympic event that she has ever entered, for a total of 11 Olympic medals. She is also the most decorated female swimmer in World Championship history, with 16 medals. She is paired up with Alec Mazo.
Chuck Liddell
Chuck Liddell is a mixed martial artist and former Ultimate Fighting Championship light heavyweight champion. In July of 2009, he was inducted into the UFC Hall of Fame. His 2008 autobiography, "Iceman: My Fighting Life," was a New York Times bestseller. He is paired up with Anna Trebunskaya.
Debi Mazar
Debi Mazar is known for her role as publicist Shauna Roberts on the HBO series "Entourage." She made her film debut in the 1990 film "Goodfellas" and her television credits include roles on "Ugly Betty" and "Friends." She is paired up with Maksim Chmerkovskiy.
Tom DeLay
Nicknamed "The Hammer," Former House Majority Leader Tom DeLay was first elected to Congress in 1984. When Republicans took control of the House, his colleagues elected him majority whip, and later majority leader. He is paired up with Cheryl Burke.
Kathy Ireland
Kathy Ireland is a former supermodel who was featured in the annual Sports Illustrated Swimsuit Issue for 13 consecutive years, from 1984-1996. She's also had various acting roles, has a line of home goods and starred in a series of fitness videos. She will be dancing with Tony Dovolani.
Ashley Hamilton
Ashley Hamilton - son of "DWTS" alum George Hamilton - has written songs for Hilary Duff and Robbie Williams, and appeared on the soap opera "Sunset Beach." Since 2007, he has been performing stand-up comedy in Los Angeles. He is paired up with Edyta Sliwinska, who was also his father's partner on Season 2.
Macy Gray
Macy Gray burst onto the music scene with her 1999 hit single "I Try." She's since gone on to sell 20 million albums worldwide and been nominated for five Grammy Awards. She is paired up with Jonathan Roberts.