Naomi Watts, 54, steps out in a chic outfit as she celebrates her birthday with partner Billy Crudup in New York

She's the award-winning actress known for her flawless sense of fashion. 

And Naomi Watts showed off her chic city style while stepping out in New York on her 54th birthday on Wednesday.

The Mulholland Drive star was joined by her actor partner Billy Crudup and her two children she shares with ex Liev Schreiber, Sasha and Kai. 

Naomi Watts showed off her chic city style while stepping out in New York on her 54th birthday on Wednesday

Naomi Watts showed off her chic city style while stepping out in New York on her 54th birthday on Wednesday

She teamed straight-leg lightwash jeans with a white T-shirt and black blazer.

Naomi accessorised the look with espadrille platform sandals, layered necklaces, a black handbag for the essentials and a bold statement ring. 

The Oscar nominee let her natural beauty shine by opting for minimal makeup. 

The Mulholland Drive star was joined by her actor partner Billy Crudup and her two children she shares with ex Liev Schreiber, Sasha and Kai

The Mulholland Drive star was joined by her actor partner Billy Crudup and her two children she shares with ex Liev Schreiber, Sasha and Kai 

Her blonde bob-length hair was half pinned back. 

Kai sported a coral pink handbag and ripped jeans, while older brother Sasha kept things casual in a baggy hoody. 

Billy, also 54, went for a smart-casual look in blue jeans with a black bomber jacket.  

Billy, also 54, went for a smart-casual look in blue jeans with a black bomber jacket

Billy, also 54, went for a smart-casual look in blue jeans with a black bomber jacket 

Friendly exes Naomi (bottom right) and Liev (second from left) continue to co-parent their two kids Sasha (left) and Kai (centre right, on the bicycle) as they date their respective new partners, Billy Crudup (centre) and Taylor Neisen (top right)

Friendly exes Naomi (bottom right) and Liev (second from left) continue to co-parent their two kids Sasha (left) and Kai (centre right, on the bicycle) as they date their respective new partners, Billy Crudup (centre) and Taylor Neisen (top right)

Naomi shares her children with ex-partner Liev Schreiber. 

They both continue to co-parent together, and recently celebrated Kai's graduation from middle school.

The NYC sighting comes after Naomi's new horror film Goodnight Mommy was released. 

Naomi and her ex-partner Liev Schreiber share two children, Kai and Sasha. Pictured in New York City on May 16, 2016

Naomi and her ex-partner Liev Schreiber share two children, Kai and Sasha. Pictured in New York City on May 16, 2016

Goodnight Mommy is a remake of the terrifying 2014 Austrian film of the same name.

The plot features young twin actors Cameron and Nicholas Crovetti, who become increasingly convinced their mother is an imposter after noticing her disturbing behaviour when she returns home following facial reconstructive surgery.

The film is available to stream exclusively on Amazon Prime Video.

The NYC sighting comes after Naomi's new horror film Goodnight Mommy was released

The NYC sighting comes after Naomi's new horror film Goodnight Mommy was released 

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