'Dancing With the Stars' Season 9 Cast Announced

The 'Dancing With the Stars' season 9 cast has been announced.

The cast -- the show's biggest to date with 16 -- was revealed by Donny Osmond live on ABC's 'Good Morning America.'

'Dancing With the Stars' premieres Mon., Sept. 21 on ABC.

Check out season 9's full roster below.

Donny Osmond
Singer

Mya
R&B singer and actress

Michael Irvin
Former NFL wide-receiver

Melissa Joan Hart
Actress ('Sabrina the Teenage Witch')

Kelly Osbourne
Singer

Debi Mazar
Actress ('Entourage')

Chuck Liddell
Light heavyweight champion

Natalie Coughlin
Olympic gold medalist in swimming

Joanna Krupa
Swimsuit model

Aaron Carter
Singer

Tom DeLay
Former House majority leader

Kathy Ireland
Model

Ashley Hamilton
Actor, son of former 'Dancing' contestant George Hamilton; previously married to Shannen Doherty and Angie Everhart.

Mark Dacascos
Actor, host of 'Iron Chef America'

Louie Vito
Pro snowboarder

Macy Gray
Grammy-winning singer