Nicole Kidman’s kids join Big Little Lies

Nicole Kidman’s young daughters will join mom in the second season of hit drama Big Little Lies.

The Oscar winner has revealed Sunday, 10, and Faith, seven — her kids with husband Keith Urban — will appear as extras on the show.

“I’ve never told anyone,” she told Ellen DeGeneres during an appearance on her daytime chat show on Tuesday. “There I am now being a big mouth.”

Kidman, who also serves as a co-producer on the show, will reprise her role as abused wife Celeste Wright, opposite returning castmates Reese Witherspoon, who is also a producer, Laura Dern, Shailene Woodley, and Zoe Kravitz, while fellow Oscar winner Meryl Streep has also joined the cast.

And The Hours star admits it’s very difficult for her and pal Reese to keep story line and set secrets to themselves.

“Probably the two of us have a bit of a big mouth, so we have to watch it,” Kidman chuckles, adding Witherspoon is “a very good secret keeper!”