The "Dancing With the Stars" cast for season nine was announced today live on "Good Morning America."

The stage is set for new "DWTS" contestants to showcase their fancy footwork when "Dancing With the Stars" returns for its ninth season Monday, Sept. 21.

The celebrity cast, which includes an Osmond, a cowboy and a former House majority leader, will team with professional dancers and face off on television's hit ballroom competition.

Gymnast Shawn Johnson was the winner on the last season of the show.

Host Tom Bergeron was in Times Square today to announce the cast.

Macy Gray

Macy Gray first burst onto the music scene with her debut album "On How Life Is" and the hit single "I Try," both of which went to No. 1. She has gone on to sell more than 20,000,000 albums worldwide and has won and has been nominated for five Grammy Awards and six MTV Video Music Awards. She has collaborated on stage and in the recording studio with some of music's greatest artists, including Justin Timberlake, Carlos Santana, Erykah Badu, Fergie, will.i.am (Black Eyed Peas), John Frusciante (Red Hot Chili Peppers) Nas and Natalie Cole. Macy has also appeared in numerous films including "Spider Man," "Training Day," "Idlewild" (with Outkast) and the award-winning HBO Film "Lackawanna Blues."

Melissa Joan Hart

Known for her starring roles in the television series "Clarissa Explains It All" and "Sabrina the Teenage Witch," Hart began her career at the early age of 4 with television commercials and various television appearances. She starred in the film "Drive Me Crazy" alongside "Entourage's" Adrian Grenier, as well as in the ABC Family Original Movie "Holiday in Handcuffs" opposite "Dancing With the Stars" alumni Mario Lopez, which was the highest-rated program in the history of the network. In 2009, Hart starred in another ABC Family Original Movie, "My Fake Fiance" that garnered huge ratings as well. In 1993, Hart started her own production company, Hartbreak Films, and is set to release her first thriller film, "Nine Dead," to DVD in January 2010. Hart and husband Mark Wilkerson are the proud parents of two sons, Mason, age 3 and Braydon, 17 months.

Kathy Ireland

Kathy Ireland, the supermodel, is now, wife, mother of three, author, Sunday school teacher and fashion CEO, of kathy ireland Worldwide. Forbes, Newsweek and the Wall Street Journal celebrate KIWW as a $1.4 billion design empire. Kathy powerfully supports many nonprofits, including the Elizabeth Taylor HIV/AIDS Foundation, Feed the Children and the Alliance for Christian Education. UCLA names Kathy as one of the Top 10 Women's Health Advocates in America.

Mya

Grammy Award-winning multi-platinum artist Mya became a star at the age of 18 with her eponymous debut album, which yielded three top 10 singles. In addition to releasing five full-length albums, one of which went platinum and another, gold, she starred in the acclaimed film "Chicago." Since "Chicago," Mya has appeared in several movies and signed onto a modeling contract. Her fourth and fifth studio albums, "Liberation" and "Sugar & Spice," respectively, have been released in Japan and her sixth studio album is scheduled for release on her independent label. A long-time advocate for young women, she founded the Mya Arts & Tech Foundation, a nonprofit organization dedicated to providing disadvantaged youth growth and opportunity through arts and technology education, where she serves as both executive director and teacher.

Mark Dacascos

Famously known as the Chairman and host of Food Network's "Iron Chef America," Dacascos is also a trained martial artist as well as an actor. Born in Honolulu, Mark's passion for martial arts began at an early age under the tutelage of his parents, who are both former national champions and teachers. After getting discovered in San Francisco's Chinatown, Mark began to establish a film and television career playing not only martial artists but a wide range of characters before joining "Iron Chef America" in 2005. He has appeared in several feature films including the internationally acclaimed French epic , "Brotherhood of the Wolf," the cult classic "Only the Strong," "Cradle to the Grave," opposite Jet Li, "Only the Brave," "Nomad" and "The Lost Medallion," which is scheduled for release later this year.

Ashley Hamilton

Actor, songwriter, comedian and son of former "Dancing With the Stars" contestant George Hamilton, Ashley is a multi-talented, multi-hyphenate with experience in film, comedy and television. An accomplished singer, Ashley had a 2003 top 20 single released by Sony, and as a songwriter co-wrote the top 10 Robbie Williams hit "Come Undone" and has writing credits for Hillary Duff, among other top acts. Ashley has made various television and film appearances in his career, including a starring role in "Sunset Beach." Since 2007 he has been performing stand-up comedy at the Laugh Factory, the Hollywood Improv, the Comedy Store and Room 5 in Los Angeles.

Michael Irvin

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." Known as the Playmake and one of the Triplets alongside fellow Cowboys Troy Aikman and Emmitt Smith, Irvin was a recipient of the Dallas Cowboys' Ring of Honor in 2005. In 2007, Irvin was inducted into the Professional Football Hall of Fame and has appeared in various television shows, as well as co-starring in "The Longest Yard" with Adam Sandler and Chris Rock. Last fall, Irvin executive produced/hosted the reality TV series "4th and Long" for Spike TV in which one football hopeful was given a shot at making the Dallas Cowboys roster. Most recently, he appeared on the Hall of Fame inductions on the NFL Network and hosts his own radio show in Dallas for ESPN Radio.

Donny Osmond

Osmond won the hearts of millions as both a member of the Osmonds and, with his sister (and "Dancing With the Stars" alumna) Marie, as the youngest co-hosts in prime time history on the iconic ABC variety series "The Donny & Marie Show." Donny and Marie are currently performing at the Las Vegas Flamingo Hotel through 2012. For nearly five decades, Donny Osmond has been a singer, musician, Broadway and film actor, talk show and game show host, best-selling author, and even a champion race car driver.

Tom DeLay

The former House majority leader is a prominent Republican and conservative firebrand. He was first elected to Congress in 1984, and when Republicans took control of the House, his colleagues elected him majority whip, and later majority leader. His leadership was characterized by his aggressive "grow the vote" method of party discipline in which he never lost a vote, leading the Washington Post to nickname him "The Hammer." He and his wife, Christine, also served as foster parents and founded a community in Texas that serves as a safe, permanent home for abused and neglected children. DeLay is currently president of First Principles LLC, a strategic political consulting firm based in Washington, D.C., and Houston.

Natalie Coughlin

Olympic swimming gold medalist Natalie Coughlin is the most decorated female athlete of both the 2008 Beijing and 2004 Athens Games. Coughlin has won a medal in every single Olympic event that she has ever entered for a total of 11 Olympic medals. In 2008, she became the first American female athlete to win six medals in one Olympiad in addition to becoming the first woman to win consecutive individual Olympic gold medals in the 100m backstroke. Coughlin is also the most decorated female swimmer in World Championship history with 16 medals. Born and raised in Northern California, Coughlin attended the University of California, Berkeley where she earned a B.A. in psychology in 2005.

Joanna Krupa

Polish-born Joanna Krupa was born in Warsaw and raised in Chicago. After high school, she moved to L.A. to pursue a career in modeling and acting. Her hard work and positive spirit led her to become one of the most requested models/covergirls in the world. PETA's "I'd Rather Go Naked Than Wear Fur" campaign featuring Joanna became a phenomenon. She's been featured in E!'s "The Sexiest" as one of the sexiest women in the world. In 2009, she was selected as the cover model for Ocean Drive magazine, and Maxim voted her among their "Top 100" women in the world. Film and TV credits include "Six Days in Paradise," due in the fall, "Ripple Effect," "Las Vegas" and "CSI: Crime Scene Investigation." Most recently she competed in ABC's "The Superstars" teaming with Buffalo Bills NFL star Terrell Owens.

Debi Mazar

Mazar's feature film debut in Martin Scorsese's "Goodfellas" set the stage for an extensive career in both television and film. She has consistently worked with notable directors -- including Oliver Stone, Spike Lee, Woody Allen, Michael Mann and Joel Schumacher -- often portraying the sharp-tongued New Yorker in both dramas and comedy. Mazar's television credits include "Friends," "Ugly Betty" and her own sitcom, CBS' "Temporarily Yours." She presently stars as publicist Shauna on HBO's hit series "Entourage." Mazar also co-hosts "Under the Tuscan Gun," a successful internet show focused on Tuscan cuisine, with her husband. The couple have two young daughters and presently reside in both Los Angeles and Tuscany, Italy.

Kelly Osbourne

Singer, actress and media personality, Kelly's father is rock icon, Ozzy Osbourne, and her mother is well-known TV personality Sharon Osbourne. Kelly got her start at the age of 16 in the first-ever "celebrity reality" TV show, "The Osbournes," with her famous family, which garnered them an Emmy Award for "Outstanding Reality Program" in 2002. That same year, Osbourne released her debut music album, "Shut Up!," which included a cover of Madonna's "Papa Don't Preach." Her second album, "Sleeping in Nothing" was released in 2005 with its first single, "One Word," hitting No. 1 on all three Billboard Dance charts simultaneously. Kelly made her dramatic acting debut in a starring role on the ABC series "Life As We Know It." In recent years she's worked primarily in the U.K. where she's done theater (including a successful run in "Chicago" in London's West End in 2007), hosted her own weekly radio show on BBC Radio and has presented numerous U.K. TV projects, including "Project Catwalk," the UK's version of "Project Runway."

Aaron Carter

Triple platinum-selling music artist/songwriter, producer, actor and younger brother of Backstreet Boys Nick Carter, Aaron Carter has established himself worldwide as a pop and teen sensation. Beginning his career at the age of 8, he is currently the youngest solo artist to have four top 40 singles. He has released four studio albums since 1997, two of which have been certified platinum, and he has appeared on several television series including "Lizzie McGuire" and "7th Heaven," as well as making his Broadway debut playing JoJo the Who in "Seussical the Musical" in 2001. He sang vocals on soundtracks for "Disneymania (The Lion King) Ella Enchanted," "Pokeman" and "Rugrats the Movie." In 2006, Carter starred in the E! reality show, "House of Carters," which featured all five of the Carter siblings living in the same house.

Chuck Liddell

Chuck Liddell is the face of the Ultimate Fighting Championship, and the icon of Mixed Martial Arts -- the fastest growing sport in America. In 1998, he won his first UFC Mixed Martial Arts fight. Soon after, Liddell rose through the ranks to become the light-heavyweight champion of the world. In July of 2009, Liddell was inducted into the UFC Hall of Fame. He is tied for the most wins by a UFC fighter with 16, and also holds the most knockout wins with 10. In 2008, Chuck penned his autobiography, "Iceman: My Fighting Life," which quickly became a New York Times best-seller. Chuck earned a bachelor's degree in business/accounting from Cal Poly San Luis Obispo, where he also wrestled.

Louie Vito

Professional snowboarder, Louie Vito, is among the U.S.'s elite snowboarders favored to make the 2010 Olympic team. Competing in both the Pipe and Slopestyle disciplines, Vito continues to train for the Grand Prix qualifying. The 21 year-old native of Bellefontaine, Ohio, 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.

(Source:  ABC News)