Speaking on The Ellen DeGeneres Show, Kidman revealed that her children will make a cameo appearance.
“They were extras in Big Little Lies, which I’ve never told anyone,” she reveals before noting that the girls would also love to appear on Ellen.
Kidman’s children – who she shares with country singer, Keith Urban – aren’t the only new faces joining the second season of Big Little Lies.
HBO’s hit show also sees Meryl Streep, 69, join the cast as Mary Louise Wright, the mother of Alexander Skarsgard’s late Perry.
“We got lucky. She signed on without having read any script,” Kidman shared. “She was like, ‘I want to be in the coven.'”
Meanwhile, Kidman is also set to star in the upcoming superhero film Aquaman. And while she can talk to her husband about Big Little Lies, she said it’s a different story when it comes to the upcoming flick.
"I've told my husband the entire plot line [of Big Little Lies], which you're allowed to do that," Kidman said. "But he doesn't know the Aquaman storyline. [That's] on bigger lockdown."
Asked if her children were excited to see their mum as a superhero, the actress joked: "[Aquaman] is the only thing that give me credibility with them in terms of my career.”