Leighton Meester is cooling her heels.

No, not the black patent heels she'll be perched high atop for her first scene of the day. That's hours away, reports The Associated Press.

Right now, she's passing time, barefoot, in a trailer parked off bustling Madison Avenue in midtown Manhattan. When she gets the call, she'll report for a 90-minute hair-and-makeup session in another trailer a block from here.

Then, returning, she'll slip into a white Thread Social eyelet mini-dress, floral-knit black tights and those T-strap pumps - just the thing for a swank Sunday brunch, as staged by her new CW drama at the New York Palace Hotel up the street, where production trucks and crew have already converged.

It's about 7 a.m. on a bright, sunny July morning, and Meester is bright and sunny, too, having arrived a few minutes earlier wearing a lavender sundress and a smile, prepared to make herself at home until she's summoned.

White noise wheezing from the trailer's air conditioner does a pretty good job masking traffic outside, "but I keep realizing: I'm on the street in a box!" Meester laughs. "Like they say: The acting is for free. I get paid to wait."

True enough. But career-wise, Meester's wait could be just about over.

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Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.