Another big takeaway for some people after learning about Mare of Easttown and watching the trailer is the eastern Pennsylvania accent that Kate Winslet had to nail perfectly to be her most authentic self as the title character of the show.
The accent, referred to as Delco because it’s from the Delaware County area, is very different from Kate’s real-life English accent and the American one she used in the movie Titanic.
“I can hear me doing it, that’s what it is,” she told USA Today of what she called her “awful” American accent in Titanic. “I think by the time I did Eternal Sunshine [of the Spotless Mind], I was getting it … Now, for me, it’s not a case of, ‘Oh, did that sound English?’ It’s, ‘Did it sound Delco enough?’ That was more of a challenge than anything.”
Watch Mare of Easttown on Sundays at 10 p.m. EST on HBO.
Source : https://www.distractify.com/p/is-mare-of-easttown-true-story