The complete "Dancing With the Stars" lineup of professional dancer-celebrity pairs was announced Monday on "Good Morning America." The list features new pro dancer Anna Demidova, who won last season's professional dance contest, as well as the return of fan favorite Louis Van Amstel. Many of the pairings were leaked on celebrity Twitter posts and Facebook pages following the announcement of season 9's stars.

Nobody was more surprised to find out his partner than Ashley Hamilton. The 34-year-old actor, comedian and singer-songwriter will follow in his father George Hamilton's footsteps. He's paired with Edyta Sliwinska, who taught his dad to dance on the show's second season."My partner is a bigger celebrity than I am," Ashley said.

Rehearsals are now underway for all 16 couples, who will hit the ballroom on Sept. 21 for "Dancing's" season 9 premiere on ABC.

Keep reading for the complete list of dance card pairs.

Mya, singer, and Dmitri Chaplin
Melissa Joan Hart, actress, and reigning "DWTS" champ Mark Ballas
Michael Irvin, former Dallas Cowboy, and Anna Demidova
Ashley Hamilton, actor, comedian, singer-songwriter, and Edyta Sliwinska
Aaron Carter, singer, and Karina Smirnoff
Kathy Ireland, former supermodel-turned-businesswoman, and Tony Dovolani
Debi Mazar, actress, and Maksim Chmerkovskiy
Natalie Coughlin, U.S. Olympic swimmer, and season 1 champ Alec Mazo
Louie Vito, snowboarder, and Chelsie Hightower
Chuck Liddell, ultimate fighting champ, and Anna Trebunskaya
Donny Osmond, singer, and Kym Johnson
Tom DeLay, former congressman, and two-time "Dancing" champ Cheryl Burke
Macy Gray, singer, and Jonathan Roberts
Joanna Krupa, model and actress, and season 7 champ Derek Hough
Mark Dacascos, Iron Chef personality, and Lacey Schwimmer
Kelly Osbourne, reality star, and Louis Van Amstel

--Monica Rizzo