They are the Block’s double duo who really are a force to be reckoned with in the renovating stakes. They can demolition and decorate like no other. And today, they’re showing us a very cute baby bump.

Alisa has posted a gorgeous photo of her newly ‘popped’ belly.

There was a minor hiccup in the original pregnancy announcement when some commenters weren’t sure which sister was actually expecting, but that was cleared up by the pair pretty quickly.

A picture of Alisa, glowing of course, with her growing bump was posted to Facebook along with the caption:

So it’s a little boy on the way too. We’re wondering what she’ll name him.

Alia looks spectacular. Image: Facebook.

This isn't the first baby for the twins, so they'll be pretty used to the pregnancy woes and wins that come along with growing a human. Lysandra has two boys, Emerson, 3 and Cohen, 18 months. She and her husband Ben Stevens separated early last year and are sharing custody of their children. Alisa has one boy, Nate, 2.

Either way - it's an exciting new addition!

Where Alisa and Lysandra your favourite Block stars?

The Block twins Alisa and Lysandra are two of the biggest stars the series has ever produced. CLICK THROUGH their career highlights so far:

Lysandra and her boys

Video thumbnail for youtube video weight loss program, The Block twins say this worked for them

The Twins from The Block

The Block's twins, out of overalls.

The Twins The Block 2014 Room

The Twins The Block 2014 Room 2

The Twins The Block 2014 3

The Block twins split

The Twins The Block 2014 1

The Twins The Block 2014 2

TheTwins win

Twins Alisa and Lysandra have won The Block

Meeting The Block alumnai

Block stars.

Via Instagram.

The Block: Fans vs Faves contestants take a selfie

Lysandra with her fellow Block contestants

The Block more shock

The Block almost winners

block-winners-2

Alisa and Lysandra

Alisa and Lysandra in a furniture store

Lysandra and her son