07/13/2010 at 12:00 AM EDT
When Project Runway
returns with its new 90-minute show
, Heidi Klum
and company will welcome another celebrity guest judge. Actress Selma Blair
will join the ranks of Eva Longoria Parker
, Lindsay Lohan
, Christina Aguilera
, Nicole Richie
and Faith Hill
, who had the honor of guest judging last season's finale
"We've been wanting to have Selma Blair on Project Runway
for a while," executive producer Jane Cha says. "She is so chic and has great individual style."
And Blair will help make a crucial decision for the show. With 17 designers, instead of the typical 16, the first challenge of season 8 will serve as the final part of the show's audition process. Contestants will have five hours to design a garment, using a signature piece from a competitor's luggage.
"Blair ended up being a perfect guest judge for our first challenge -- super knowledgeable about fashion and the show, because she's a fan," Cha continues. "She had some hilarious observations, including a comparison to Romy and Michelle
's new season kicks off July 29 at a new time (9 p.m. EST) on Lifetime.