Zac Posenand his friend Ryan Murphy had been itching to collaborate on a project for years.

The Swans,which premieres tonight.

Murphy summoned Posen to set, where he watched Calista Flockhart-as-Lee Radziwill film a scene in a hair salon.

A couple in masks arriving at Truman Capote’s Black and White Ball in the Grand Ballroom at the Plaza Hotel in New York City

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This isnt a historical recreation piece, he says.

This is a different story that were telling through historical figures.Each ladyhad their own history to bring.

I started off much more closely to history.

Research is everything. My process when Im working on something historical is that I really go deep into history. I…

Posen raced against the clock to finish the Swans gowns.

I had basically half of November and December to build these, he says.

He also faced the additional pressure of designing for television as opposed to the runway.

Joanne Carson We had a lot of fun with this one. Joanne was an actress and an entrepreneur such a free spirit and I…

On a runway, something needs to be able to walk and come back.

When youre working with actors, youre dealing with character development on womens bodies.

My process when Im working on something historical is that I really go deep into history.

Nina Faulk as the matron apparition the black swan she needed to be in all black so I constructed a custom embroidered…

I made a board for each different and went from there.

Im a movie, TV and history fanatic.

These women were all individual style icons and I wanted to honor their looks with a Ryan Murphy twist.

Babe Paley Here we created a gown of ivory zibeline. Her opera coat is like a swan itself with the feathers dipped in…

Joanne Carson: We had a lot of fun with this one.

This is a graphic dupioni gown made in black and ivory silk.

We added a full cape to up the drama.

Babe Paley: Here, we created a gown of ivory zibeline.

Her opera coat is like a swan itself with the feathers dipped in solid silver.

The gloves are imported jet black satin, and the jewels are rubies and garnets by Vedura.