Nicky Hilton is now a model! Paris Hilton's younger sister shows off a Valentino suit and purse while in a BATHROOM at The Plaza Hotel in NYC

Nicky Hilton glowed as she modeled for fashion brand Valentino on Instagram on Thursday.

The 39-year-old daughter of fashion designer Kathy Hilton sat on the sink in an ornate bathroom at The Plaza Hotel in New York City while wearing a matching set from the luxury Italian fashion brand.

Her outfit starkly contrasted the white and gold bathroom she was photographed in as she sported the matching set and a bright pink bag next to her, also from Valentino.

Lots of color: Nicky Hilton glowed in a new set of photos for Valentino on Instagram on Thursday

Lots of color: Nicky Hilton glowed in a new set of photos for Valentino on Instagram on Thursday

She captioned her post on social media: 'Impromptu bathroom break series.'

The nighttime set she had on was black with multicolored flowers and butterflies on the button-up top, as well as the ankle-length pants.

Her top had black feathers protruding from the ends of the sleeves, and she paired the ensemble with black pointed-toe heels.

The blonde beauty posed on the sink with her legs crossed and looked both away from the camera and into the camera.

Beauty queen: The 39-year-old socialite sat on the sink in an ornate bathroom at The Plaza Hotel in New York City while wearing a matching set from the luxury Italian fashion brand

Beauty queen: The 39-year-old socialite sat on the sink in an ornate bathroom at The Plaza Hotel in New York City while wearing a matching set from the luxury Italian fashion brand

Glowing girl: The bombshell had on a black nighttime set with multicolored flowers and butterflies on the button-up top, as well as the ankle-length pants

Glowing girl: The bombshell had on a black nighttime set with multicolored flowers and butterflies on the button-up top, as well as the ankle-length pants

Nicky's blonde hair was perfectly styled, with light waves down her shoulders. In one shot, she had the front of her hair pulled back in a clip, which could be seen in the mirror behind her. 

For makeup, she went with a very elegant look that featured glowing skin, shimmering eyeshadow, and natural lips.

She also wore a large silver necklace, silver earrings, and several rings.

The mother of three has worked with Valentino for several years alongside her sister Paris Hilton, 41, and her mother, Kathy, 63.

Sister sister: Nicky and her sister Paris have worked with Valentino for several years and have shared the brands newest campaigns on their social media accounts; seen together for Valentino The Party Collection

Sister sister: Nicky and her sister Paris have worked with Valentino for several years and have shared the brands newest campaigns on their social media accounts; seen together for Valentino The Party Collection

Hot mom: The mother of three has also done several photoshoots and campaigns with Paris during their time as American socialites, including shoots with Vogue and Billboard; seen for Valentino The Party Collection

Hot mom: The mother of three has also done several photoshoots and campaigns with Paris during their time as American socialites, including shoots with Vogue and Billboard; seen for Valentino The Party Collection

The sisters have done several photoshoots and campaigns together during their time as American socialites, including shoots with Vogue and Billboard. 

Valentino made her wedding dress in 2015 when she married her husband, banking heir, James Rothschild.

The dress was a custom lace-embroidered gown with three shades of ivory and silver guipure, sparkling with a dusting of hand-embroidered crystals. It also had a high neckline and a balloon skirt.

Family values: Famed fashion designer Katy Hilton is the mother of Paris and Nicky and the three have done shoots together for several brands, including Valentino; seen at their family's holiday party in 2022

Family values: Famed fashion designer Katy Hilton is the mother of Paris and Nicky and the three have done shoots together for several brands, including Valentino; seen at their family's holiday party in 2022

A princess: Nicky wore a Valentino custom lace-embroidered gown for her wedding to James Rothschild in 2015. It was made with three shades of ivory and silver guipure, sparkling with a dusting of hand-embroidered crystals; seen at her wedding in London, England

A princess: Nicky wore a Valentino custom lace-embroidered gown for her wedding to James Rothschild in 2015. It was made with three shades of ivory and silver guipure, sparkling with a dusting of hand-embroidered crystals; seen at her wedding in London, England

James is the founder and managing partner of Tru Arrow Partners. Tru Arrow is a global growth technology firm built around family capital.

The pair recently welcomed their third child in July 2022, whose name has yet to be disclosed to the public. They also have two daughters, Lily-Grace, six, and Teddy, five.

Before marrying James, she was married to Todd Meister, but the two got a divorce after less than a year of marriage.