If you've seen Nicole Kidman on the silver or small screen, you know her skin is pretty much flawless. Lucky for her fans, the 52-year-old actress just spilled her beauty secrets in a recent interview with Allure. Her biggest anti-aging tool? Sunscreen—and lots of it.

"I used to be like, ‘All those creams, who cares?’ But definitely as I’ve gotten older, I’ve realized those creams are necessary," the Big Little Lies star shared with the mag. "I’m shooting outdoors a lot, so the most important thing is the sunscreen — I use Neutrogena SPF 100+." (Worth noting: Nicole is a spokesperson for the brand.)

And she's religious about reapplying.

"I reapply every 90 minutes, every single day,” she said.