But now, we're finding out about some of those who were asked by producers of the ABC show to be on - but who turned them down.
Among those who were asked - former Secretary of State Condoleezza Rice. Others who were invited and said no include Sylvester Stallone, billionaire Richard Branson, former TV star Suzanne Somers and Facebook creator Mark Zuckerberg.
The bunch of celebrities - past, present and perhaps future - on the current show begin their quest for the mirrorball trophy on September 20.
