Who was American socialite Slim Keith?

TV fans will be hooked to their screens with the new 'Feud: Capote vs The Swans' featuring socialite Slim Keith.

The wealthy woman was at war with Truman Capote after he infiltrated her tiny circle. But who was she? Here's everything you should know.

Nancy “Slim” Keith, also known as Lady Keith of Castleacre, was born on July 15, 1917, in Salinas, California.

She earned the nickname 'Slim' for her tall, thin figure, which captured the attention of the fashion world.

Her modelling career started after landing on the cover of Harper’s Bazaar by the age of 22.

She built a name for herself in New York City - where she remained a fixture on the best-dressed lists at the time for many years to come.

Was Slim Keith married?

Keith was married various times to very important men from the film industry.

She married 'Scarface' director Howard Hawks who was the first of three husbands.

She also married Howard Bacall and Kenneth Keith, Baron Keith of Castleacre.

It was during her last marriage when Keith met Truman Capote.

As the writer became more popular, the author began hanging around socialites whom he called "The Swans."

In 1958, Capote began working on a novel called Answered Prayers which reportedly followed the lives and secrets of Slim Keith and other women.

The book was postponed to release, however, Esquire posted the first four chapters in 1975 and 1976.

When Keith read the chapters, she realized Capote's novel was an exposé of her life under pseudonyms and sometimes the real names.

As a result of her depiction as the fictionalized character Lady Coolbirth, Keith completely shut Capote out of her life.

Ryan Murphy’s hit anthology series Feud is back for another season.

The latest season follows the story of Truman Capote and the dramatic social fallout with the socialites he named "his swans".

The series first appeared on January 31 featuring Naomi Watts, Demi Moore and Calista Flockhart.