ET also spoke to Keith Urban about doing a cameo on the second season of the hit HBO show.
Nicole Kidman is in awe of Meryl Streep.
The 50-year-old actress is currently working with the iconic Oscar winner on the second season of Big Little Lies, and admitted that she gasps while watching Streep act.
"We've already been shooting. It's so good," Kidman, alongside her husband, Keith Urban, told ET's Nancy O'Dell at the 2018 ACM Awards in Las Vegas, Nevada, on Sunday. "She's just amazing, and to watch her do her craft, it really is artistic craft when you watch her, we're all -- Laura Dern, Shailene [Woodley], Zoe [Kravitz], Reese [Witherspoon] -- we just go, Gasp, can you believe it?"
Streep plays Mary Louise Wright, mother of the recently deceased Perry Wright (Alexander Skarsgard).
"She's got a fantastic character," she continued. "It's also grounded and it's based in something very, very real, and we hope we bring you the [best] second season and it delivers. We're working hard."
Urban is also a Streep fan. "Who isn't?" he joked.
"I love that she's joined this crazy cast and this incredible Big Little Lies," the country superstar expressed. "I've seen little bits and pieces of it already and it's amazing. Amazing."
While Kidman has been featured on Urban's song "Female," would a possible cameo from the Australian singer be in the works for season two of the HBO show?
"No, I'll go on the set. I wouldn't go on camera," Urban stated, adding, "I love being on set where Nic is. I'd rather be in the studio."
"He might do a cameo, wouldn't you?" Kidman asked her hubby, with him replying, "No."
"Never?" Kidman slyly asked again.
For more on the adorable twosome, watch below.