Justin and Hailey Bieber shared their first family picture to their Instagram page on Friday.

Justin cradled his two-month-old son Jack Blues Bieber in his arms for the snap.

Hailey, 27, dressed up as Kim Possible for her Halloween costume, with Justin, 30, dressed up as Ron Stoppable.

The lovebirds announced the birth of their son on August 23 - one day after he was born - posting a snap of their baby boy's foot - along with his name. 

Justin held son Jack in his arms for the snap - with Jack wearing a pink robe.

Hailey lovingly had her hand on Jack's back.

Hailey channeled Kim Possible in green cargo bottoms with a black turtleneck, flashing her slim waist.

The stunner, who is in the founder of Rhode Skin, added gloves and a red wig to finish off her look.

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

Ron Stoppable is Kim's best friend. 

Justin playfully pulled his shirt up, with Hailey posing with her tongue sticking out by his bare chest. 

Justin and Hailey also shared a sweet moment in another snap of their Halloween costume.

Hailey also posted a photo of Jack wearing his adorable Jack Skellington and Oogie Boogie onesie and socks. 

Hailey had a second Halloween look - this time dressed up as Nicole Richie in The Simple Life.

Best friend Kendall Jenner dressed up as Paris Hilton. 

Justin, 30, had shared the first image of Jack Blues on August 23rd with the caption: 'Welcome home Jack Blues Bieber,' adding a teddy bear emoji. 

Days later, Hailey showed off a $2K diamond ring that said 'mom.'

Their baby boy was born on August 22nd.

The post has since garnered over 22 million likes. 

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.