What do a supermodel, a real housewife, a Broadway star, and Joan Collins have in common? (Hint: It's not a reality TV show.) This curious cross-cultural mix of women will all be walking in The Heart Truth's Red Dress Collection fashion show on Thursday night.

The annual affair always draws an interesting line-up with past catwalkers including everyone from Fergie to Susan Lucci and Katie Couric to Valerie Bertinelli. This year's list of participants, which has just been revealed, is equally as intriguing!

Thursday's runway show will include Heidi Klum, Kim Kardashian, Raven-Symoné, Jewel, Kimora Lee Simmons, Kristin Chenoweth, Elisabeth Hasselbeck, Felicity Huffman...and, indeed, Dynasty legend Joan Collins too.

The list of designers that have created dresses for the show is similarly stellar, featuring Donna Karan, Oscar de la Renta, Michael Kors, Zac Posen, John Galliano, Monique Lhuillier, Badgley Mischka, Marchesa, Tracy Reese, Rebecca Taylor and more.

And if that covetable list puts you in the mood for shopping, here's a way to do it guilt-free: selected dresses from the show -- yes, the actual frocks the celebs will wear on Thursday -- will be auctioned off at the Clothes Off Our Back website, with proceeds benefiting the Foundation for the National Institutes of Health, earmarked for research and awareness on heart health for women.

Be sure to come back Friday morning for full coverage of the Red Dress Collection show, and the meantime check out our daily Fashionable Factoids from the Heart Truth.