Ashly DelGrosso-Costa has reported on her website that she will be back.

Corky confirmed on Mark's website that he and Derek would be back, although this message was modified the day after.

Jonathan Roberts is speculated not to be back as he wants to concentrate on competing.

Julianne is back (!) although up to now she has denied it as she would have been on tour, which judging by her website, she now finishes in the middle of August. http://www.charlotte.com/200/story/715471.html

Maks will be back

Ashly's website and it says she will be back for the 100th ep (which obviously has already aired) but I can't see anything about season 7. This might just be me being completely thick, though!

Ashly's website has changed. About 4 weeks ago it said something like, 'Ashly will be returning for season 7', now it just has 'thanks for your support in season's 1,2 ,3'. She was rumoured to be taking the place of Julianne as she was going to be on tour, which it looks like she isn't now. Sorry if I got your hopes up!!

Corky Ballas will be on the show this year. It's been confirmed by 'janegarth' of the ABC board. janegarth is thought to be a 'Ballas' insider, e.g. Shirley. Mark, Derek and Julianne have also been confirmed by her.

Kim Kardashian
Cloris Leachman
Lance Bass
Toni Braxton
Brooke Burke
Maurice Greene
Cody Linley
Susan Lucci
Jeff Ross
Warren Sapp
Misty May-Treanor
Ted McGinley
Mark McGrath

Julianne Hough with 5ft8 actor Cody Linley, 18;
Corky Ballas with Oscar/Emmy winning actress Cloris Leachman, 82;
Cheryl Burke with 5ft9 Olympic sprinter Maurice Greene, 34;
Mark Ballas with 5ft1 "socialite" and sex-tape/reality-show star Kim Kardashian, 27;
Derek Hough with 5ft7 model/presenter Brooke Burke, 37;
Alec Mazo with 5ft3 singer Toni Braxton, 40;
Tony Dovolani with 5ft1 daytime-soap actress Susan Lucci, 61;
Maks Chmerkovskiy probably with 5ft10 Olympic-beach-volleyball star Misty May Treanor, 31;

and I think 5ft9 Lance Bass, 29, will be with Kym Johnson because she had Joey Fatone in season 4 and both guys were in NSync

Don't know about Warren Sapp but he's 300 lbs (21st) and 6ft2 (American-style-football player).

Other celebs data:
Mark McGrath, 40, 5ft10 -- singer for "Sugar Ray"
Jeff Ross, 43, 5'10" -- comedian
Ted McGinley, 40, 5'11" -- actor

There may be two new female pros.

The huge sportsman Warren Sapp is 35 years old.

Lacey Schwimmer from SYTYCD is the new female pro which I think is a bit weird you would think that if they were looking from a pro from sytycd that they would pick Anya, Pasha or Chelsie as Lacey is known more as a swing dancer

Also Anna isn't coming back

Fabian won't be on this season. And Jonathan Roberts and Anna Trebunskaya are sitting this one out -- I think because they want to (?) or maybe somebody just assumed that since they're back competing again. I don't think Louis van Amstel will be there either.

This post showed up just now: "Inna Brayer is confirmed and is dancing with Ted McGinley." by TWoP poster Zigletto.