SARAH Jessica Parker and Kim Cattrall are two of the four main stars of the Sex and the City franchise.
A reboot of the hugely popular series is expected to launch on HBO Max - without Cattrall.
Why does Kim Cattrall have a beef with Sarah Jessica Parker?
Kim Cattrall and Sarah Jessica Parker have been in a public feud for years.
Sex and the City writer and executive producer Michael Patrick King said the relationship between SJP and Cattrall was rough.
"The show doesn't exist if Sarah Jessica wasn't the blonde star of the show, that's number one," King told .
"Kim was not at the height of her career, Kristin was under her in terms of notability, Cynthia was a theatre actor - and their contracts reflected that status.
"As the show progressed, the characters, everybody grew; it became a family. Kristin, Cynthia, and Sarah Jessica became one group, and Kim never joined mentally."
He continued: "Kim fought and said, 'I'm everyone's favorite.'… (Parker's) name was contractually, legally, righteously, the only name on the poster due to the fact that she was a movie star in 1998 when the series started, and she did a leap to do a show about sex on (HBO), the channel that did the fights, and it doesn't matter how popular you are.
"I guess for Kim, it didn't matter how much the raise became if there was never parity, but there was never going to be parity."
What have Kim Cattrall and Sarah Jessica Parker said about each other?
Cattrall told Piers Morgan in 2017: "This is really where I take to task the people from Sex and the City, and specifically Sarah Jessica Parker.
"I think she could've been nicer. I really think she could've been nicer. I don't know what her issue is."
Parker told Watch What Happens Live host Andy Cohen in 2018 that she was "heartbroken" after Kim said she was never friends with her co-stars.
The 55-year-old : "I found it very upsetting because that's not the way I recall our experience.
"It's sad, but I always think that what ties us together was this singular experience. It was a professional experience, but it became personal because it was years and years of our lives, so I hope that that eclipses anything that's been recently spoken."
She concluded: "That many years spent doing something so special that people had a connection with it is such a privilege."
Parker had told in 2009: "I don't think anybody wants to believe that I love Kim. I adore her. I wouldn't have done the movie without her. Didn't and wouldn't."
Will Kim Cattrall be in the Sex and the City reboot?
The 64-year-old actress will not return for the new show.
An industry insider revealed to that the show would likely air on HBO Max in the form of a limited series.
The insider added that Kim - who starred as Samantha Jones - would not return for the reboot.
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The original series, which ran on HBO from 1998-2004, also starred Sarah Jessica as Carrie Bradshaw, Cynthia Nixon as Miranda Hobbes, and Kristin Davis as Charlotte York.
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In addition to the original series, two Sex and the City movies came out in 2008 and 2010.
A third movie was proposed, but Cattrall declined to participate, so it never came to fruition.