Kylie Jenner celebrates Hailey Bieber's baby news: 'We're moms now'

'Like.....where did the time go???????!' Hailey Bieber reacts to Kylie's sweet throwback post on Instagram.

Kylie Jenner and Hailey Bieber have come a long way from their days as carefree besties, now embracing their new roles as mothers. 

The beauty mogul recently took to her Instagram Story to share a series of throwback photos with Hailey, accompanied by the text, "we're moms now @haileybieber." 

Hailey responded with amazement, writing, "Like.....where did the time go???????!"

Kylie, who shares 6-year-old daughter Stormi and 2-year-old son Aire with ex Travis Scott, has been friends with Hailey for over a decade. 

Hailey is currently just over six months pregnant with her and Justin Bieber's first child.

The couple surprised the world on May 9 by announcing Hailey's pregnancy. 

They shared the joyous news through a video at the same time they renewed their vows in Hawaii. 

Since then, Hailey has proudly showcased her growing baby bump, including Yves Saint Laurent modeling pictures and a stylish mirror selfie shared on her Instagram Story.

Hailey captioned her modeling photos with, "shot this 4 months preggy with little bean in my belly." She and Justin, who have been married since 2018, are eagerly awaiting the arrival of their "little bean" or "little cherry blossom."

A source close to the couple told ET last month, "Hailey and Justin are looking forward to finally having a family of their own. They're excited to grow closer, learn together, and share this beautiful experience with each other. They're soaking up this time and appreciating this moment with close friends and family on both sides."