During the chat, King said, "Let's start with the day you were born. Who paid for the hospital bill?"
Roberts responded with some apparent surprise, saying King's "research is very good."
"The King family paid for my hospital bill," the star explained. "Martin Luther King and Coretta."
Roberts' parents, Betty Lou and Walter, ran a theater school in Atlanta, the Actors and Writers Workshop, that back in the 1960s was one of the few -- if not the only -- school that would accept the children of Coretta and MLK. The families, needless to say, became friends.
55 years ago, when Walter and Betty Lou could not afford the hospital bills for the birth of their daughter Julia in Smyrna, Georgia the Kings came to the rescue.
"They all became friends and they helped us out of a jam," Julia explained.
The children of the Kings and Julia became close as well -- including the eldest of MLK's children Yolanda King, who died in 2007.
In 2001, Yolanda said of the Roberts theater school, "It was an extended family, it really was. And all of these Black kids and White kids getting along, no problems."
However, according to Georgia-based author Phillip DePoy, there were in fact problems -- but from the outside. In a 2013 essay, he describes being a 15-year-old boy in a theatrical production put on by the Roberts' group back in 1965.
According to DePoy, he kissed MLK's daughter Yolanda in the play which caused uproar. "I was primarily Caucasian and Yolanda wasn't," he writes. "That's what the trouble was about."
DePoy says "a tangential member of the Ku Klux Klan" saw the kiss during the production and "he came back the next day with a box," and blew up a Buick outside the theater. However, he says cops did arrest him but "with very little energy."
.@GayleKing traded her day of rest to interview Julia Roberts quicker than you could say, “I’m just a girl, standing in front of a boy, asking him to love her.”
Meanwhile, during Roberts' interview with Gayle King, the reporter noted: "In the '60s, you didn't have little Black children interacting with little white kids in acting school. And Julia's parents were welcoming, and I think that's extraordinary, and it lays the groundwork for who Julia is."
One aspect of Julia's upbringing came to light back in 1990 when she called a South Carolina town "horribly racist" after a Black friend was apparently refused service at a local eatery. She was lambasted by residents of the South.
Roberts said in a statement at the time: "I was born in the South, so in no way am I trying to create a stereotype." She then added, "I was shocked that this type of treatment still exists in America in the '90s — in the South or anywhere else."
"I can see her doing that," Yolanda King told CNN in 2001 of the story. "I can see it pouring forth from her, and rightfully so."