In the episode where Carrie is invited to Mr. Big and Natasha's engagement party, the props department decided to make up a first name for the character to appear on the invitation, knowing that it would never appear on screen.
Sarah Jessica Parker opened the envelope to find she had been invited to the wedding of "Boris and Natasha" (named after the villains in
"Rocky and His Friends" (1959)), she reportedly couldn't stop laughing for five minutes.
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