The new "Dancing With the Stars" cast will be officially announced today on "Good Morning America" . . . but so-called "sources" leaked several names last night . . . and the great BILLY DEE WILLIAMS is one of them.


The cast will also ALLEGEDLY include Danica McKellar from "The Wonder Years" and Candace Cameron-Bure from "Full House".


Gold medal-winning ice dancers Charlie White and Meryl Davis.


Long-distance swimmer Diana Nyad.


Former NHL star Sean Avery.


James Maslow from "Big Time Rush".


Singer Cody Simpson.


"Real Housewife" Nene Leakes.


"Price is Right" host Drew Cary.


And future chick Bruce Jenner.