The Block's Dan and Dani Reilly announce the devastating passing of their daughter Billie at 10 days old

The Block's Dan and Dani Reilly have announced the devastating news that their daughter has passed away at 10-days-old.

The couple told followers in a post shared to Instagram on Friday morning, confirming they'd named their daughter Billie Vera Reilly.

"It is with insurmountable grief that we share the news that our daughter Billie, has passed on from this life and into the next at just 10 days young," the couple shared.

"In Billie's short time in this world, she taught us an intensity of both love and pain we never knew possible. She taught us what really matters.

"Billie was so wanted, so loved and she made us parents… and what an honour it is to be her mummy and daddy. She will always be our daughter."

Alongside a photo of the couple at hospital by Billie's side, they continued: "It's clear to us that Billie was far too good for this world but if we know anything for sure, it's that Billie's legacy will make an impact greater than all of us.

"Thank you @mrskevinsphotos for capturing such beautiful family photos for us and also for @heartfelt_ausnz for capturing many of Billie's firsts.

"We want to make special mention of "Billie's Besties" at @theroyalwomens - the nurses, doctors & staff in NICU are some of the most incredible people to walk this earth and we'll be forever grateful for the care and love they gave our girl, and us."

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The couple shared a link to make a donation to The Royal Women's Hospital via this link.

The post concluded: "Lastly, we understand there will be questions, and so many of the answers we just don't have yet.

"We'll share more in time but for now we ask for privacy as we work through this together and with our loved ones."

They signed off with a quote that read: "'You look so pretty, pretty like the sun. I could watch forever, while you shine on everyone.' We love you Billie. 8/12/24 - 18/12/24."

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Australia came to know and love Dan and Dani in 2012 when they became contestants on The Block while they were dating and left with a life-changing $448,000.

Dan and Dani returned in 2013 for the The Block All Stars series taking home a profit of $220,000, and Dan later became Foreman on The Block.

The pair tied the knot in 2018 after nine years together in an intimate ceremony on Victoria's Mornington Peninsula.

The Red Nose Grief and Loss Support Line is available 24/7 for anyone affected by the loss of a pregnancy, stillbirth or death of a baby or child on 1300 308 307.