In one of Dr. Martin Luther King, Jr.’s last acts of generosity, the civil rights champion and his wife, Coretta, paid the hospital bill for the parents of superstar actress Julia Roberts.

It’s a little-known fact that recently surfaced when a social media post from a previous interview Roberts, 55, gave to CBS Mornings’ Gayle King.

“My parents had a theater school in Atlanta called the Actors and Writers’ Workshop,” Roberts said.

“And one day Coretta Scott King called my mother and asked if her kids could be part of the school because they were having a hard time finding a place that would accept her kids.”

Roberts’ mother said ‘sure’ and thus began the friendship between the civil rights leaders and Walter and Betty Lou Roberts.

That led to the Kings paying for the birth of the woman who would go on to become an international star.

“They helped us out of a jam,” Julia Roberts said.

An assassin’s bullet cut down King in Memphis on April 4, 1968.

But just months before, on October 28, 1967, Roberts’ mother went into labor in Smyrna, Georgia.

Until now, the story had mostly gone untold.

“Grateful that Julia Roberts shared this story with Gayle King,” Bernice King, the daughter of Martin and Coretta, wrote on Twitter. “And that so many people have been awed by it. I know the story well, but it is moving for me to be reminded of my parents’ generosity and influence,” King said.

Noted strategic advisor Zara Rahim said: “Fifty-five years ago, MLK and Coretta Scott King paid for her parents’ hospital bill after she was born. Can’t stop thinking about this since I read it.”

And writer Christopher ‘Mr. Christopher’ Seals praised the Oscar winning actress.

“The fact that Julia Roberts has one of the ultimate civil rights flexes, but never talked about this throughout her career, says everything about her character,” Seals wrote.

“I learned this about her last year and was surprised as well.”