Hailey Bieber is one less lonely girl during her pregnancy.

After all, her and husband Justin Bieber's baby on the way was right there with the model when she posed for Saint Laurent's Summer 2024 fashion campaign by Anthony Vaccarello. As Hailey revealed on her Instagram Stories June 3, shortly after the campaign was unveiled, she "shot this 4 months preggy with little bean in my belly."

In one image snapped by photographer Gray Sorrenti, the 27-year-old disguised her growing bump in a camel-colored jumpsuit that cinched at the waist with a large belt. Another photo showed Hailey rocking an oversized button-down top that concealed her waist.

Indeed, the Rhode Skin founder and Justin were very careful in keeping their baby news under wraps during the first trimester.

For example, Hailey's shifted her personal style earlier this year, embracing larger coats and loose-fitting blazers into her daily wardrobe. She also leaned into babydoll dresses, donning one that had an empire waistline during a Hawaiian vacation in May before her pregnancy announcement. 

But these days, Hailey has no problem baring her baby belly. In a separate Instagram Story on June 3, she shared a photo of herself in strapless ivory top and matching wide-legged pants with her bump in full view.  

A second selfie, which appeared to be taken from inside her walk-in closet, showed her midriff peeking out from under a black, long-sleeved top and low-rise trousers. She paired the casual look with a striped yellow-and-navy sweater draped across her shoulders, as well as a BMW baseball cap and a black YSL handbag.

To seem more of Hailey's baby bumpin' maternity looks, keep reading.

Amid her pregnancy, Hailey Bieber bared her growing baby bump in an open blouse and oversized blazer while visiting Japan with husband Justin Bieber.

The couple—who married in a September 2018 courthouse ceremony before tying the knot again a year later at a lavish wedding—shared a sweet kiss in their vacation photos in May 2024.

Hailey captioned the pictures on Instagram Story, "Mom n Dad fr."

The model showed off her baby bump in an ivory two-piece while visiting the Rhode Skin offices.

Hailey's baby bump played peek-a-boo in this all-black ensemble.

During their Japan trip, Hailey—clad in white crop top—and Justin visited artist Takashi Murakami‘s sculpture outside of the Kyocera Museum of Art in Kyoto.

The Rhode Skin founder showed off her baby belly in a yellow baby tee, which matched perfectly with her knitted bucket hat. 

Hailey donned a see-through top and bralette—as well as a statement necklace bearing her and Justin's last initials—during a night out in Los Angeles.

Hailey proved that maternity style can have an edge to it, rocking a cropped leather jacket with low-rise trousers.

The model's baby bump played peek-a-boo in this see-through, lace dress.

Hailey kicked back in an oversized T-shirt and baseball cap during her pregnancy.

She donned a pink butterfly top and low-rise blue jeans in a series of Instagram photos shared in May 2024.

The Y2K-inspired top inspired Hailey to pose for an impromptu photo shoot.

In the snaps, Hailey cradled her baby bump as she looked toward the horizon.

Hailey wore a lacy Saint Laurent gown to renew her vows with Justin in Hawaii. The couple announced their pregnancy on May 9, sharing footage from the intimate ceremony.