'Like nothing we've seen before': Judges stunned by newcomers' Room Reveal 'miracle' in epic sneak peek

Maddy and Charlotte's arrival has seriously shaken up the competition on The Block.

And if the latest sneak peek for Sunday's Room Reveals is anything to go by, the girls are just getting started.

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"Two young gun sisters are about to change the game," the voiceover says.

The judges are in awe of the sisters' room and it looks like Maddy and Charlotte have pulled off a main bedroom "miracle".

You can watch the full sneak peek in the video above.

"This is like nothing we've ever seen before," judge Shaynna Blaze raves.

"Look at it! They've done this in three days. It blows my mind," Marty Fox seconds.

But just how will the other teams react to the newcomers' success?

READ MORE: 'Crazy': Shelley is shocked by Maddy and Charlotte's 'big secret'

Maddy and Charlotte's room isn't the only thing that stuns the judges.

Kylie and Brad's "daring" golden ceiling has the judges' jaws on the floor.

"This is like walking into a jewellery box," Darren Palmer beams.

While Shaynna simply calls it "insane".

Tune in on Sunday night to see the unveiling of the teams' dazzling main bedrooms and walk-in robes.

The Block continues Monday to Wednesday at 7:30pm and Sunday at 7pm on Channel 9 and 9Now.

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Stream every episode ever of The Block for free on 9Now.