Tim Gunn Dishes on Nicole Kidman's Project Runway Appearance

Nicole Kidman is no Victoria Beckham — at least when it comes to appearing on Project Runway.

While the Spice Girl enjoyed a lengthy appearance during the season four finale of the hit Lifetime show, Runway's co-host Tim Gunn tells OK! that Nicole’s appearance on Thursday night’s Project Runway: All-Star Challenge will be rather brief.

“Let me put it this way, yes, she makes an appearance,” Tim coyly told OK! when asked about the Oscar-winner's role on the special, which sees eight designers from from previous seasons return to compete against each other. “She’s one of the reigning royal figures in Hollywood so we were thrilled to have her on the show in any capacity.”

Tim wasn't quite as cagy about details on the upcoming sixth season of Project Runway. While he remained hush-hush on specific challenges the contestants will face, he did reveal that he’s most excited about the group collaborations.

“The more voices involved, in my view, the better the challenge ends up being,” Tim explained to OK! while passing out umbrellas to fans in Manhattan to promote Lifetime’s move to Channel 62 in New York City.

It's been reported that some of the guest celebs on Season Six will include Lindsay Lohan, Eva Longoria and Christina Aguilera.

The two-hour All-Star Challenge special airs Thursday at 8pm ET on Lifetime, with the much-anticipated Season Six premiere airing immediately after, at 10pm ET.