Josh Brolin and pregnant wife Kathryn glow on red carpet of Sicario: Day Of The Soldado screening

She is pregnant by her startlingly older husband Josh Brolin.

And Kathryn Boyd, the star's assistant-turned-third-wife, draped her baby bump in a slinky mini in New York City on Monday.

She was there for a special screening of Sicario: Day Of The Soldado, which stars her 50-year-old husband alongside Benicio Del Toro.

Side by side: Kathryn Boyd, Josh Brolin's assistant-turned-third-wife, draped her baby bump in a slinky mini in New York City on Monday

Side by side: Kathryn Boyd, Josh Brolin's assistant-turned-third-wife, draped her baby bump in a slinky mini in New York City on Monday

Kathryn let her wavy blonde hair fall free over her shoulders, accentuating her winning features with makeup and holding a sleek black clutch.

She showed off her cleavage in a teeny-tiny black cocktail dress, flinging a see-through black and white diamond-print layer over it.

Smiling radiantly by her husband's side, she heightened the leggy effect of her outfit by slipping into a pair of open-toed black stiletto boots.

The occasion: She was there for a special screening of Sicario: Day Of The Soldado, which stars her 50-year-old husband alongside Benicio Del Toro

The occasion: She was there for a special screening of Sicario: Day Of The Soldado, which stars her 50-year-old husband alongside Benicio Del Toro

So fabulous: Kathryn let her wavy blonde hair fall free over her shoulders, accentuating her winning features with makeup and holding a sleek black clutch

So fabulous: Kathryn let her wavy blonde hair fall free over her shoulders, accentuating her winning features with makeup and holding a sleek black clutch

When you got it: She showed off her cleavage in a teeny-tiny black cocktail dress, flinging a see-through black and white diamond-print layer over it

When you got it: She showed off her cleavage in a teeny-tiny black cocktail dress, flinging a see-through black and white diamond-print layer over it

Meanwhile, Josh oozed dash and elan in a black suit, leaving a couple of buttons of his black dress shirt undone over his chest.

The son of James Brolin and stepson of Barbra Streisand slicked his greying hair up at the front, popping on a pair of glinting black dress shoes.

He posed up a storm at the event alongside Benicio, who had also co-starred with him and Emily Blunt in the original 2015 Sicario movie.

Meanwhile: Josh oozed dash and elan in a black suit, leaving a couple of buttons of his black dress shirt undone over his chest

Meanwhile: Josh oozed dash and elan in a black suit, leaving a couple of buttons of his black dress shirt undone over his chest

Colleagues: He posed up a storm at the event alongside Benicio, who had also co-starred with him and Emily Blunt in the original 2015 Sicario movie

Colleagues: He posed up a storm at the event alongside Benicio, who had also co-starred with him and Emily Blunt in the original 2015 Sicario movie

Tres chic: Wearing his hair in a stylishly tousled do, Benicio buttoned himself into a navy suit and clashed it elegantly against a black tie

Tres chic: Wearing his hair in a stylishly tousled do, Benicio buttoned himself into a navy suit and clashed it elegantly against a black tie

Wearing his hair in a stylishly tousled do, Benicio buttoned himself into a navy suit and clashed it elegantly against a black tie.

He cut a glamorous figure in a pristine white dress shirt, modeling a pair of black shoes and a massive glistening left hand ring.

Actress and songbird Margot Bingham, though not in the new Sicario film, was nonetheless a showstopping presence on the red carpet.

Swanking about: He cut a glamorous figure in a pristine white dress shirt, modeling a pair of black shoes and a massive glistening left hand ring

Swanking about: He cut a glamorous figure in a pristine white dress shirt, modeling a pair of black shoes and a massive glistening left hand ring

Gorgeous: Actress and songbird Margot Bingham, though not in the new Sicario film, was nonetheless a showstopping presence on the red carpet

Gorgeous: Actress and songbird Margot Bingham, though not in the new Sicario film, was nonetheless a showstopping presence on the red carpet

She slid her enviably svelte figure into a sleeveless cocktail dress with an intricate black and white floral print and a striking sky blue hem.

Gathering her hair above her head, she accessorized with a massive pair of hoop earrings and revealed her scarlet nails in open-toed heels.

Dean Winters, who is also not a part of this film, had allowed a bit of distinguished grey scruff to sprout onto his attractively craggy face.

Radiant: She slid her enviably svelte figure into a sleeveless cocktail dress with an intricate black and white floral print and a striking sky blue hem

Radiant: She slid her enviably svelte figure into a sleeveless cocktail dress with an intricate black and white floral print and a striking sky blue hem

Hunk: Dean Winters, who is also not a part of this film, had allowed a bit of distinguished grey scruff to sprout onto his attractively craggy face

Hunk: Dean Winters, who is also not a part of this film, had allowed a bit of distinguished grey scruff to sprout onto his attractively craggy face

His floral button-down shirt faded from a dark to a light blue from collar to hem, and he complemented the top with a pair of faded light blue jeans.

Another actor not in the movie, Oliver Platt, was nonetheless a scene-stealer on the red carpet owing to his head-turning set of suspenders.

His hair arranged into a bouffant, he wore a sky-blue dress shirt and pine green trousers, accenting the look with wide-rimmed shades.

Hands in the pocket: His hair arranged into a bouffant, he wore a sky-blue dress shirt and pine green trousers, accenting the look with wide-rimmed shades

Hands in the pocket: His hair arranged into a bouffant, he wore a sky-blue dress shirt and pine green trousers, accenting the look with wide-rimmed shades

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