Exclusive: The Block 2025 cast reveal one couple cause 'chaos' while another 'have never had an argument' in new unseen video

EXCLUSIVE: You'll soon know them as the stars of The Block 2025, but how well do they know each other?

In the exclusive video above, ahead of tonight's mammoth premiere, the new Blockheads dished everything you need to know about their partners (and teammates).

So, which couples work well together – and who's headed for absolute "chaos"?

The Block Season 21 will premiere on Sunday July 27 at 7pm on Channel 9 and 9Now.

Perth couple Han and Can met just over a year ago online.

They admitted that maybe they have "too much in common" before making a surprise relationship confession.

READ MORE: All-important detail about The Block finally revealed

"We'd never had an argument," said Han, describing their relationship as "very chill with no conflict at all".

Will all that change as they tackle Australia's biggest ever renovation competition?

The Block's second police couple Britt and Taz are also from sunny WA.

In the video, Taz paused to describe his wife in three words.

"I wouldn't say patient...," he laughed.

But he did describe her as slightly "chaotic" – in a good way!

READ MORE: Meet the reno rookies at the centre of 'biggest scandal The Block has ever seen'

"The amount of things that run through her head at once to try be in this place is chaos," said Taz.

One Block 2025 star was described as "sassy, witty and a comedy show all in one".

We bet you can't guess who that is!

Watch the full exclusive video at the top!

For an explosive Block 2025 sneak peek, catch the latest first looks here:

The Block Season 21 will premiere on Sunday July 27 at 7pm on Channel 9 and 9Now.

FOLLOW US ON WHATSAPP HERE: Stay across all the latest news from your favourite shows via our WhatsApp channel. No comments, no algorithm and nobody can see your private details.