Superhero cleavage! Rose Byrne takes the plunge in low-cut black number at New York screening of X-Men: Apocalypse

She became for a mother for the first time just three months ago.

And Rose Byrne's post-baby body is in super shape.

The 36-year-old actress looked absolutely fantastic in low-cut frock as she attended the screening for her latest flick X-Men: Apocalypse in New York City on Tuesday night.

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Hot mama: Rose Byrne looked fantastic as she attended the screening for her latest flick X-Men: Apocalypse in New York City on Tuesday night

Hot mama: Rose Byrne looked fantastic as she attended the screening for her latest flick X-Men: Apocalypse in New York City on Tuesday night

She looked fabulous in the flowy, sheer black maxi dress which featured a gold star and polka dot pattern emblazoned all over it.

The sheer-lining could be seen on the V-neckline of the dress just over her cleavage as she finished off the look with a pair of black leather heels.

Rose accessorised with large spiked earrings and a matching dangling chain necklace which featured two spiked pendants.

Stunner: The 36-year-old actress looked fabulous in the flowy, sheer black maxi dress which featured a gold star and polka dot pattern emblazoned all over it

Stunner: The 36-year-old actress looked fabulous in the flowy, sheer black maxi dress which featured a gold star and polka dot pattern emblazoned all over it

Look like a star in Rose's Valentino dress

Just months after delivering her first baby, Rose is already in tip-top shape looking gorgeous on the red carpet in Valentino.

She had us seeing stars in this black tulle, ballerina dress embellished in tiny cosmic bursts throughout.

The classic fit and flare cut is a quintessential Valentino move-- a label that has never been prone to revealing cuts and overtly sexual silhouettes. Those looking to showcase their figure need not apply.

But where some might find this dress "lacking" in intricate cutouts, Rose's delicate dress falls gracefully to her ankles-- rendering her demure and sophisticated on the red carpet.

That's why we love Valentino. That's why the Italian label will always have our heart.

Sadly, Rose's exact dress won't be available till Fall, but feel free to scope out some of our favorite alternatives below in the meantime.

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Pretty: Rose accessorised with large spiked earrings and a matching dangling chain necklace which featured two spiked pendants

Pretty: Rose accessorised with large spiked earrings and a matching dangling chain necklace which featured two spiked pendants

Casual cool: Upon her arrival at the event, Rose bundled up in a black leather jacket
Casual cool: Upon her arrival at the event, Rose bundled up in a black leather jacket

Casual cool: Upon her arrival at the event, Rose bundled up in a black leather jacket

Her highlighted brunette tresses were done up in a messy updo as she sported natural, complimentary make-up on her face with a swipe of nude lip.

Upon her arrival at the event, the Aussie star kept it stylish and warm with a black leather jacket draped over her shoulders. 

Rose plays Moira Mactaggert in the superhero franchise, who is a CIA agent working to uncover the mysterious Hellfire Club. She starred as the character once before in 2011's X-Men: First Class.

Dynamic duo: Two of the newcomers to the series were also at the event, Alexandra Shipp (left) and Lana Condor, who play superheroes Storm and Jubilee, respectively

Hot summer: The 24-year-old actress wore a multi-coloured mini dress with a palm tree embroidered on it

Hot summer: The 24-year-old actress wore a multi-coloured mini dress with a palm tree embroidered on it

Golden girl: Lana wore an intricate gold and black mini dress

Golden girl: Lana wore an intricate gold and black mini dress

Brunette beauty: Carolina Bartczak looked fantastic in an LBD
Brunette beauty: Carolina Bartczak looked fantastic in an LBD

Brunette beauty: Carolina Bartczak looked fantastic in an LBD

Two of the newcomers to the series were also at the event, Alexandra Shipp and Lana Condor, who play superheroes Storm and Jubilee, respectively.

Alexandra, 24, looked cute in a multi-coloured, low-cut mini dress featuring a palm tree embroidered on the side along with black leather heels.

Lana stunned in a extravagant gold mini dress featuring a brocade detailing along with black leather heels.

Veterans: James McAvoy (left) and Evan Peters were also in attendance as they looked dapper in their suits
Veterans: James McAvoy (left) and Evan Peters were also in attendance as they looked dapper in their suits

Veterans: James McAvoy (left) and Evan Peters were also in attendance as they looked dapper in their suits

Cuddled up: Evan posed with Carolina, who is newcomer to the franchise

Cuddled up: Evan posed with Carolina, who is newcomer to the franchise

Three's a crowd: James, Evan and Carolina looked like they were having a blast together

Three's a crowd: James, Evan and Carolina looked like they were having a blast together

Veterans of the comic book series James McAvoy and Evan Peters were also in attendance as they looked dapper in their suits.

The upcoming film is the ninth in the highly-popular superhero movie franchise as it forces all the X-Men to re-unite to take on the world's first mutant Apocalypse.

X-Men: Apocalypse is set to hit screens in the US on Friday. It has already been released in the UK and several countries around the world.

Altogether now: James McAvoy, Tye Sheridan, Evan Peters, Carolina Bartczak, Jim Gianopulos, Rose Byrne, Alexandra Shipp, Lana Condor, and Simon Kinberg - pictured from left to right - took a group photo 

Altogether now: James McAvoy, Tye Sheridan, Evan Peters, Carolina Bartczak, Jim Gianopulos, Rose Byrne, Alexandra Shipp, Lana Condor, and Simon Kinberg - pictured from left to right - took a group photo 

Highly-anticipated:X-Men: Apocalypse is set to hit screens in the US on Friday. It has already been released in the UK and several countries around the world

Highly-anticipated:X-Men: Apocalypse is set to hit screens in the US on Friday. It has already been released in the UK and several countries around the world

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