"We went through dozens of looks and shots, but it never once seemed like a chore," Rocha said. "Zac sat to the side hand-selecting show tunes for me to dance around to."
In a behind-the-scenes video shot by Rocha's husband, James Conran, the designer and model dance around to Liza Minnelli's "New York, New York" — but not before talking about how useful it is to have friends in a business where each new assignment can sometimes feel just like the last.
"In a very transient and oftentimes flaky industry, it's been so comforting to work with Zac season after season, through good times and bad," Rocha said off camera.
"We all work so hard, striving for perfection," Posen added. "It's nice to be able to laugh and entertain each other in these fun, candid moments."
A look at these two friends doing just that in the video below.