Former TOWIE star Billi, 28, and footballer Andy, 27, welcomed their first child together, Arlo Thomas Carroll, on 15 June last year - and have been utterly smitten ever since!
Marking the milestone today, proud Billi shared a photo to Instagram showing Andy holding Arlo shortly after his birth, while Billi is still lying on her hospital bed.
Billi said: "Was True Love At First Sight. Happy 1st Birthday My Baby Boy. From This Moment My Life Changed Forever You Are The Most Beautiful Happy Loving Little Boy. I'm So Proud Of You. Thank You For Making Mine And Daddy's Life So Special. Can't Wait To Watch You Grow And Learn. We Love You So Much."
Proud Andy also celebrated the first birthday on his own Instagram, sharing an image showing himself cradling a tiny newborn Arlo in the palm of his hand.
"Can't believe this is how I used to hold him!! Happy 1st Birthday to my little big man!!" he wrote.
Billi announced on Christmas Day 2014 that she was expecting a child with Andy. Her happy baby news came after he proposed to her during a romantic visit to Rome.
The couple held a first birthday party for Arlo two weeks ago, before flying to Thailand for a family holiday. It featured balloons, a personalised sweet cart, drinks and food and, of course, presents!