We watched her grow up on Laguna Beach and The Hills, as she tackled the struggles of teenage life and moving to a new city. But now, Lauren Conrad is set to attempt her biggest challenge yet; being a mum. 

Lauren announced the exciting news via Instagram yesterday morning. Alongside a picture of her holding a sonogram, the gorgeous blonde wrote: “Happy New Year! I have a feeling 2017 is going to be the best year yet . . .”

Happy New Year! I have a feeling 2017 is going to be the best year yet…

A photo posted by Lauren Conrad (@laurenconrad) on

After a turbulent relationship with on-screen boyfriend Jason Wahler, Lauren was set up on a blind date with her now husband William Tell.

Celebrating 2 wonderful years with my love today!

A photo posted by Lauren Conrad (@laurenconrad) on

The pair were married in September 2014 after dating for two years. We can’t wait to see how Lauren tackles motherhood. Congratulations! 

Want more? Here's one of our fave moments from Jase & PJ – they’re always up to something! Weekdays from 6AM on KIIS 101.1!