On Saturday morning, The Block's Sara and Hayden Vale welcomed their baby boy.
And the very next day they shared his darling first moments, along with his name.
Watch the incredible video of Harlow meeting her brother in the video below!
"Finally we have a little man with a name!"
"Meet the newest addition to our family, Lawson Jett Vale born 26th April at a weight of 3.9kgs. Time to get the tool belt on buddy," they shared on Instagram.
"All of our hearts are so full and Harlow is the best big sister. 👨👩👧👦"
And young Harlow was clearly smitten.
The proud parents shared on their Instagram stories their eldest gushing over her baby brother.
Hayden filmed his 2-year-old, "Let's go and meet brother. Yes!"
Harlow gushed, "yay!"to which Hayden said, "Someone's excited!"
Hayden and Sara won the 2018 series of The Block.