One of The Block's best-ever "baddies" is having a baby.

There is yet another Block Baby, on the block…

Former ‘The Block‘ star Alisa Fraser has just announced that she is pregnant with her second child – in a very cute way.

You look confused – and we’re seeing double. Alisa Fraser is one half of the ‘Alisa and Lysandra’ package deal, aka ‘The Twins’, aka ‘The Sisters,’ aka one of the uhhh, feistiest duo’s to hit The Block.

Here they are – but don’t ask us who is who.

Twins, Alisa & Lysandra. Image via Instagram @alisa_lysandra.

The 31-year-old posted an image of herself and four-year-old son Nate to Instagram holding a calligraphed sign, which reads, ‘I am going to be a big brother.’

Clearing up any confusion Alisa captioned the photo ‘I (Alisa) am excited to announce that Nate is going to be a big brother. My husband and I are expecting our second child in mid-January.

‘And for everyone wondering, yes there is only 1 in there:-) We cannot wait to meet our little………….soon Xx Thanks to @littleredesigns for this super cute sign. #bigbrother.’

It’s clear the couple is staying hush on the sex of the baby. Take a look.

Speaking with the Daily Telgraph , Alisa explained that her pregnancy was ‘a long time coming.’

She said, “We were initially planning to have a second (child) before we even started on The Block.”

“It’s three years late but it’s better late than never.”

Alisa’s exciting news comes after sister Lysandra Fraser confirmed that her and husband Ben Stevens had split in February of this year.

Congratulations, Alisa.

In the meantime, flick through this gallery of the genetically blessed duo:

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