That red dress in 'The Diplomat' finale was so important it was written into the script

Kate Wyler would always finish "The Diplomat" wearing a red dress.

The instantly iconic look from the Netflix series' season finale finds Keri Russell's new diplomat in the UK attending a gala at the Louvre in a flowing red dress, reminiscent of none other than Audrey Hepburn in "Funny Face". And that particular look was written into series creator Debora Cahn's script from the start.

"Red has always been in Debora's script," "The Diplomat" costume designer Roland Sanchez told IndieWire. “Debora explained everything. She is very attentive. She's very costume-oriented and there are reasons why she does things for these characters."

From the script, Sanchez found a red dress from Galvan London that suited her perfectly. But then the scout brought bad news. “[The dress] was originally a burgundy. But we were shooting in a burgundy piece the exact color of the dress, so we needed a different red,” Sanchez said. The solution? They recreated the dress with a few alterations (a fitted neckline, a longer train) in the "beautiful saturated red" we saw.

The red dress is an exclamation point in Kate's transformation from reluctant ambassador to political animal ready for the limelight after years of supporting her self-centered husband, Hal (Rufus Sewell) - not to mention her burgeoning attraction to British Foreign Secretary Austin Dennison (David Gyasi). The Kate we meet initially doesn't make sense, and, as she repeatedly tells everyone trying to turn her into something a little more glamorous, she wears black suits for a reason. /p>

David Gyasi and Keri Russell on "The Diplomat"

Courtesy of NETFLIX

His reasons are the same as those of real-life diplomats: incessant travel. "Deobra did who...