Nicole Kidman shares adorable throwback photo for her and Keith Urban's daughter's 9th birthday

Nicole Kidman and Keith Urban's baby girl is now 9 years old.

The "Big Little Lies" star celebrated her youngest daughter's birthday by sharing a throwback photo of her holding Faith as a toddler to Instagram on Sunday. The mom of four also posted a photo of the birthday girl's cake, which was lit with ten birthday candles.

"Our baby girl is now 9! We love you so much precious precious girl," Kidman captioned the post. "Happy birthday Faith!"

Other celebrities commented on the post wishing Faith a happy birthday.

"Stunning!! Happy Birthday Faith!" wrote fellow "Big Little Lies" star Reese Witherspoon.

"What a photo," commented actress Gwyneth Paltrow.

Supermodel Naomi Campbell wrote "Gorgeous" along with three heart emojis.

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Kidman shares another daughter with Urban, Sunday Rose, 11. She also has two children from her previous marriage to Tom Cruise: Isabella Jane Cruise, 27, and Connor Cruise, 24.

Earlier this year in a Vanity Fair interview, the 52-year-old actress shared her parenting policies may make her "unpopular" with her children.

“They don’t have a phone and I don’t allow them to have an Instagram,” she said. “I try to keep some sort of boundaries.”

Kidman is also raising them religious, adding that she has a strong belief in God.

“A lot of my friends tease me,” she said before adding that the family goes to church.

“That’s how we are raising our children. Keith has his own beliefs but he comes, too. I had a very Catholic grandmother, and I was raised praying, so that had massive impact," she said. "I wouldn’t say it’s absolutism, there’s constant questioning – I’m a willful, feisty girl. For me it’s very important that I don’t have judgment. My dad would always say, ‘Tolerance is the most important thing.’ ”

Contributing: Sara Moniuszko