Susan Sarandon took to Twitter over the weekend to quash an old rumour that she'd already debunked nearly two decades ago.

When she co-starred with Julia Roberts in the weepy 1998 drama Stepmom, there was chatter that the two women hated each other. So ahead of the movie's release, the actresses addressed the rumours in Entertainment Weekly.

Roberts was especially colourful about the gossip: "Actually, Susan and I were kinda hoping that people would say we were [having sex]," she said at the time. "Now that's delicious cocktail-party fodder. But this? Boring."

Now Sarandon is revisiting the rumours because they echo her FX series Feud. In the show, she plays Bette Davis to Jessica Lange's Joan Crawford. The story takes place during the contentious filming of 1962's What Ever Happened to Baby Jane.

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The actresses didn't hide their antipathy for one another, but Ryan Murphy's series shows that the people around them fuelled the animosity, trying to gin up controversy to get moviegoers to buy tickets. It worked.

According to Sarandon, her allegedly sour relationship with Roberts came from a similar place.

"Found out it was my PR person creating rumours," Sarandon tweeted.

Sarandon would like everyone to know that she and Lange are more than just cordial.

"She's one of the reasons I agreed to do the series. Working with brilliant actors only makes you better."