The “Big Little Lies” costars share the same name, it turns out.

What’s in a name?

Allow Laura Jeanne Reese Witherspoon to answer.

Big-Little-Lies2

Shailene Woodley, Zoe Kravitz, Reese Witherspoon, Laura Dern, and Nicole Kidman in ‘Big Little Lies’.Jennifer Clasen/HBO

It came mid-story, in a video segment forVanity Fair, while the two were discussing costarLaura Dern.

Witherspoon asked, “Why?”

“Because it sounds weird!”

Witherspoon said, “Do you know why?

Because my name is Laura, and her name is Laura, and its confusing to me.

My real name is Laura Jeanne.

So I get confused and just call her Dern.

We cant both be Laura.

“I got excited,” Kidman explained.

“Its okay, baby.

I get excited too,” Witherspoon said.

“Then Ive got Laura calling me, and Zoe and Shailene.

Theyre all like, ‘Nic said that were makingBig Little Liesseason 3?’

“But we are now!”

“Were moving fast and furious, and Liane is delivering the book.

Were in good shape.

If you talk about doing it, its the dopamine hit of doing it.

You feel like youve done it.”