Hailey Bieber shared a rare glimpse of her three-month-old baby boy Jack Blues in a sweet family snap with her husband Justin Bieber.

She uploaded a heartwarming new Instagram album the day after Thanksgiving and wrote the caption: ‘November aka the best month of the year.’

The past month had been an especially festive one for Hailey, since it included not only Thanksgiving but also her own star-studded 28th birthday party.

Her album opened with a snap of her and Justin wearing coordinated print coats and grinning broadly at the camera while enjoying a stroll in a cold climate.

In that picture, Hailey had baby Jack clasped to her front, though his face was turned away from the camera in order to preserve his privacy.

Since her son was born in August, Hailey has posted pictures of him only very infrequently, and neither she nor Justin has ever shown his face on social media.

Hailey Bieber shared a rare glimpse of her three-month-old baby boy Jack Blues in a sweet family snap with her husband Justin Bieber

Hailey’s new Instagram album included a close-up snap of one of the martinis she enjoyed during her birthday party, the theme of which was centered on the cocktail.

She also uploaded a mirror selfie in which she was wearing a crop top, showing off her sensationally chiseled post-baby midriff. 

Over the course of her album, she seized the opportunity to plug her beauty line Rhode, posting several pictures of products from the brand. 

Hailey made sure to feature an adorable close-up sH๏τ of her Yorkshire Terrier Piggy Lou, whom she and Justin adopted about two years ago.

She also allowed fans to get a few peeks at her stylish winter wardrobe, such as one look in which her knit scarf was fashionably wrapped around her head.

Her latest album comes a week after she rang in her 28th birthday surrounded by some of her closest friends, including Kendall Jenner and Lori Harvey, with a martini-themed dinner party. 

Hailey got all glammed up to celebrate in a very Sєxy all-black ensemble, which consisted of a fur-trimmed jacket, tiny shorts, тιԍнтs and a pair of slingback heels.

She accessorized her chic look with a sparkly diamond choker, coordinating earrings and her golden blonde hair in a sleek half-up, half-down style.

She also uploaded a mirror selfie in which she was wearing a crop top, showing off her sensationally chiseled post-baby midriff

She uploaded a heartwarming new Instagram album the day after Thanksgiving and wrote the caption: ‘November aka the best month of the year.’

The past month had been an especially festive one for Hailey, since it included not only Thanksgiving but also her own star-studded, martini-themed 28th birthday party

Hailey made sure to feature an adorable close-up sH๏τ of her Yorkshire Terrier Piggy Lou, whom she and Justin adopted about two years ago

She also allowed fans to get a few peeks at her stylish winter wardrobe, such as one look in which her knit scarf was fashionably wrapped around her head

Read More Hailey Bieber covers up in glam coat for chic Rhode campaign less than three months after giving birth

The new mother also sported a eye-catching manicure, featuring a martini olive design as a nod to her ‘a tini bit 28’ party theme. 

The Rhode founder shared plenty of pictures from the evening to her Instagram Story as she documented the scene, desserts, drinks and time with friends. 

In one image, she can be seen standing from the side as she held an espresso martini next to a table full of martinis, cakes and sugary doughnuts.

Others showed her posing under a lit neon ‘Martini Bar’ sign inside a restaurant, before getting showered with love from her loved ones. 

A sweet video on her Instagram Story showed Jenner, 29, presenting her longtime pal with a beautiful birthday cake. 

This marks her first birthday since becoming a mother on August 22. 

Hailey and Justin announced her pregnancy in May, after sharing footage of their vow renewal ceremony they had in Hawaii – with her baby bump on full display. 

Before giving birth, she spoke to W Magazine about morning sickness, her pregnancy diet and why she announced her baby joy when she did.

Over the course of her album, she seized the opportunity to plug her beauty line Rhode, posting several pictures of products from the brand

Hailey included a more dressed-down selfie as well

‘I probably could have hid it until the end. But I didn’t enjoy the stress of not being able to enjoy my pregnancy outwardly,’ she told W magazine.

‘I felt like I was hiding this big secret, and it didn’t feel good. I wanted the freedom to go out and live my life.’ the niece of Alec Baldwin explained.

‘I was honestly able to keep it quiet because I stayed small for a long time. I didn’t have a belly, really, until I was six months pregnant, which was when I announced it. I was able to wear big jackets and stuff,’ she noted.

Hailey also noted that in order to maintain her health, she has made sure to consume plenty of protein, including ‘lots of eggs, chicken, and steak.’ 

She also enjoys premade items from the Los Angeles health food store Erewhon – a favorite of celebrities – and the trendy beverage kombucha.

‘In the beginning [of pregnancy], it was super emotional for me. Like: “I love this human so much. How can I possibly bring someone else into this?” I’m trying to soak in these days of it being Justin and me, just the two of us,’ she said.

Hailey rang in her 28th birthday surrounded by some of her closest friends, including Kendall Jenner and Lori Harvey, with a martini-themed dinner party

Hailey seen with Lori Harvey (L)

She also has to be careful about going online, as ‘the Internet is a scary place for a pregnant woman’ what with all the anecdotes floating around social media.

‘You see so many stories – traumatic birth stories, traumatic experiences – and I know that that’s very real. But I don’t want to scare myself,’ she said.

Since welcoming her baby boy, she has shared only a small handful of pH๏τos of her newborn, including an adorable snap of from her family’s first Halloween together.

For Halloween, Hailey dressed up as Kim Possible while her husband Justin, 30, went as Ron Stoppable and their son Jack as Rufus. 

Kim is the animated тιтle character for the series Kim Possible, which is about a teen girl who has to save the world while dealing with growing up. 

Neither Hailey or Justin have shared any pH๏τos of their little boy’s face.