Hailey Bieber shows hint of baby bump in elegant all-black as she stars in YSL Beauty's Libre Flowers and Flames fragrance 

Hailey Bieber was unveiled as one of the four famous faces of YSL Beauty's Libre Flowers and Flames fragrance.

The Rhode Beauty founder – who is expecting her first child with husband Justin Bieber, 30  – shared two photos from the instantly iconic campaign for her 52.9 million Instagram followers.

In one photo, Hailey, 27, looked radiant in a close up of her holding the perfume bottle while wearing a heavy gold link necklace.

Her brown hair was parted on the side and swept off her face while her makeup was natural featuring rosy cheeks and a pink lip color.

In the second image, the model lounged on a couch in a long-sleeved, boat-neck black top that allowed some of her growing baby bump to show with a slinky black skirt. 

Hailey Bieber teased her baby bump as she was unveiled as one of the four famous faces of YSL Beauty's Libre Flowers and Flames fragrance this week

Hailey Bieber teased her baby bump as she was unveiled as one of the four famous faces of YSL Beauty's Libre Flowers and Flames fragrance this week

The Rhode Beauty founder – who is expecting her first child with husband Justin Bieber , 30 – shared two photos from the instantly iconic campaign for her 52.9 million Instagram followers

 The Rhode Beauty founder – who is expecting her first child with husband Justin Bieber , 30 – shared two photos from the instantly iconic campaign for her 52.9 million Instagram followers

She held a large Calla lily to her face as she looked directly at the camera. 

The niece of Alec Baldwin believes fragrance can transport you. 

'A scent can take you right back to a certain time in your life, or a certain person in your life,' she said in an interview with Vogue.

'I've gone back to scents that I wore 10 years ago just for the pure nostalgia of it. I have a few scents that I've brought back years later after not wearing it and it triggers so many memories for me.'

And Hailey is certainly entering a new phase of her life with a baby on the way so she's turned to a new fragrance: YSL Beauty's Libre Flowers and Flame. 

'There is a sexiness to the fragrance, while still feeling very elegant and chic,' she told the outlet. 'That is exactly how I feel when I wear it.'

As Vogue explains it: 'This interpretation of the Libre fragrance (there are six in total) spins the original juice into something more gourmand with notes of coco-palm tree, lily, orange blossom, and vanilla. 

'Bieber is the opening chapter of YSL Beauty and Mitchell's Flowers & Flames series, which will feature three other trailblazing women in the weeks to come.'

The niece of Alec Baldwin believes fragrance can transport you. 'A scent can take you right back to a certain time in your life, or a certain person in your life,' she said in an interview with Vogue

The niece of Alec Baldwin believes fragrance can transport you. 'A scent can take you right back to a certain time in your life, or a certain person in your life,' she said in an interview with Vogue

'I've gone back to scents that I wore 10 years ago just for the pure nostalgia of it. I have a few scents that I've brought back years later after not wearing it and it triggers so many memories for me'

'I've gone back to scents that I wore 10 years ago just for the pure nostalgia of it. I have a few scents that I've brought back years later after not wearing it and it triggers so many memories for me'

'There is a sexiness to the fragrance, while still feeling very elegant and chic,' she told the outlet. 'That is exactly how I feel when I wear it'

'There is a sexiness to the fragrance, while still feeling very elegant and chic,' she told the outlet. 'That is exactly how I feel when I wear it'

A press release provided to DailyMail.com stated: 'This new project brings together four talents; a group of dynamic, resilient women, who dare to live free of societal rules and expectations, amongst the current landscape. 

'Each one of them is more than just a public figure, or a social media handle. The LIBRE voices are each trailblazers for the future generation of women. 

'They embody the LIBRE spirit and are strong feminine voices who live a life free of bounds.'

'I'm excited to be one of the women representing this generation and to be a part of this project during such a special time in my life. This project allows us to show the strengths in self-ownership, confidence, and diversity, and I am very happy to be a part of it,' Hailey explained.