'Growing up with you has been one of the more meaningful aspects of life': Naomi Watts, 50, wishes best friend Nicole Kidman a happy 52nd birthday and jokes about taking up bingo

They've known each other for almost their entire lives, having gone to high school together in Sydney.

And on Friday, Australian actress Naomi Watts wished her lifelong friend Nicole Kidman a happy 52nd birthday.

Taking to Instagram, The Ring star, 50, shared a sweet flashback image of the pair together, before joking that they should start playing bingo together. 

BFF's! Naomi Watts (L) gushes about best friend Nicole Kidman (R) on her 52nd birthday and jokes they should start playing 'bingo'

BFF's! Naomi Watts (L) gushes about best friend Nicole Kidman (R) on her 52nd birthday and jokes they should start playing 'bingo'

'Happy Birthday to my extraordinary friend, Nicole,' Naomi's post began. 

'Growing up with you, having you close, has been one of the more meaningful aspects of this journey.'

She added: 'My love, respect and admiration for you is next level. Keep being the inspiration that you are. Let's take up bridge or bingo soon. I love you madly, deeply.'

Sweet: She added: 'My love, respect and admiration for you is next level. Keep being the inspiration that you are. Let's take up bridge or bingo soon. I love you madly, deeply'

Sweet: She added: 'My love, respect and admiration for you is next level. Keep being the inspiration that you are. Let's take up bridge or bingo soon. I love you madly, deeply'

In the photo, the pair are hugging, with Nicole sporting her signature red curls. 

Naomi regularly shares sweet flashback images of herself with Nicole, and last year for her birthday, thrilled fans when she shared a snap of them dancing with a friend back in the day. 

In the post, she said that the pair were 'soul sisters'.

'Soul sisters': Naomi regularly shares sweet flashback images of herself with Nicole, and last year for her birthday, thrilled fans when she shared a snap of them dancing with a friend back in the day

'Soul sisters': Naomi regularly shares sweet flashback images of herself with Nicole, and last year for her birthday, thrilled fans when she shared a snap of them dancing with a friend back in the day

Naomi and Nicole are two of Australia's biggest Hollywood exports. 

The pair first met at high school in Sydney, where they attended North Sydney Girls' High School. 

However, Naomi admitted that it wasn't until when she got a role in the film Flirting back in 1991 that their friendship really took off. 

'We already knew each other but that's when our friendship forged,' Naomi told PEOPLE in June 2017. 

Pals; The pair first met at high school in Sydney, where they attended North Sydney Girls' High School. However, Naomi admitted that it wasn't until when she got a role in the film Flirting back in 1991 that their friendship really took off

Pals; The pair first met at high school in Sydney, where they attended North Sydney Girls' High School. However, Naomi admitted that it wasn't until when she got a role in the film Flirting back in 1991 that their friendship really took off

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Naomi Watts gushes about best friend Nicole Kidman on her 52nd birthday

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