Nicole Kidman is reminiscing about her past!

The 52-year-old actress has posted a beautiful flashback picture of herself and two of her best pals, including Naomi Watts, another Australian actress.

“My earliest #WCW’s @NaomiWatts & @HeyRiggy ❤️️️,” the actress captioned this lovely shot.

CREDIT: NICOLE KIDMAN / INSTAGRAM

Watts, 51, expressed her gratitude for the kind gesture by saying, “Love you ladies so much I love you.”

Nicole is dressed head to toe in pink, her blonde locks pulled back as she points and offers a knowing look to the camera.

Nicole and Naomi met in high school in Sydney, but their relationship was solidified on the production of the 1991 film Flirting.

Watts previously told PEOPLE, “We already knew each other but that’s when our friendship forged.”

“We’ve gone through a lot together over a significant amount of time. That history binds you,” the winner of The Loudest Voice declared. “We have a strong respect and love for one another.”

Kidman has also referred to their relationship as a sisterhood.

When Kidman was honored at the Women in Film Crystal and Lucy Awards in 2015, she told PEOPLE, “We’ve known each other since we were teenagers. And actually, when I was thinking about it, I was like, it’s like my sister giving me this award tonight. And we’re like sisters. I mean, we’ve known each other for so long, through so many things. And this is the kind of the sidebar of our life. Really, our life is all the personal stuff.”

“Back in the day, you fueled me with hope and encouragement. You kept saying, ‘Nai, one thing, one thing. That’s all it takes. It will change everything.’ And it’s only later that I realized the true power of that statement,” Watts said. “The sisterhood needs many more friends like you, and the world needs many more people like you.”

In 2005, Nicole told The Telegraph about their strong bond.

“I think that’s really rare, particularly for actresses, and I take a lot of pride in that,” she said.

Without giving too much away about what it’s like to hang out with the couple, Watts has indicated on many occasions that they know how to have a good time.

Watts previously told PEOPLE, “If you hang out with us, you’ll have fun. I’ll promise you that.”