Julia Roberts talked about when Dolly put her in her place on the set of Steel Magnolias. They were outside for hours and it was really hot. Everyone was putting ice on themselves and Dolly was just sitting there unbothered. Finally, Julia said "Dolly, you’ve got a wig, and the wool, I mean, c'mon. It's hot, sweat a little. Just say, 'I'm hot,' you know? 'This is a drag!'"
Dolly responded: "When I was a little girl, I wanted to be famous and I wanted to be rich, and now I'm both those things. I'm not going to complain about it."
Julia said she didn't say a word the rest of the day, and carried those words with her the rest of the career -- any time she felt the urge to complain, she would think about Dolly on that porch.
That story captures Dolly perfectly -- by all accounts she was the same in real life as she was on stage