Chris Sandilands has announced he is engaged to girlfriend Nat Bartolo after a surprise stadium proposal earlier this month.

Radio king brother Kyle Sandilands shared the happy family news with KIIS listeners on Monday.

Chris popped the question to Nat during a Luke Combs concert in Sydney - with him clearly thrilled to have a new sister-in-law.

'My brother got engaged that night (at the concert),' Kyle, a newlywed himself, said.

Kyle said Chris wanted to make it a surprise by not telling anyone of his intentions to pop the question.

'He didn't want to tell anyone about it because he did it in the middle of a song,' Kyle explained.

However, the proposal attracted the attention of concert-goers which saw them erupt in cheers for the couple.

'The whole stadium started cheering when he proposed,' he said.

Kyle Sandilands' brother Chris has shocks a stadium at a Luke Combs concert after he proposed to girlfriend Nat Bartolo earlier this month. Pictured

'They'd finished the song so everyone in the stadium looked up and was like ''what's the kerfuffle''.

'Then saw him on his knee with his big warrior beard and mohawk.'

KIIS FM shared footage of Chris down on one knee as he asked Nat to be his bride.

The pair immediately kissed after she said 'yes'. Chris wiped away tears during the emotional moment.

Kyle and the KIIS team shared footage of Chris and Nat, as he got down on bended knee as fans in the stadium cheered for the pair. Pictured

KIIS FM viewers were only too pleased for the couple, leaving their best for the pair.

'Congratulations to you both. I was there that night,' one listener said. 'Congratulations to you both,' another wrote.

'Congratulations to them both and especially to my cuz Nat,' another added.

'They'd finished the song so everyone in the stadium looked up and was like ''whats the kerfuffle''. 'Then saw him on his knee with his big warrior beard and mohawk'

Chris has appeared on his brother's top-rated show over the years. In 2017, he suffered a horrific injuries due to a motorbike accident

Chris has appeared on his brother's top-rated show over the years.

In 2017, he suffered a horrific injuries due to a motorbike accident.

He had to be airlifted to hospital where he underwent two operations.

Suffering serious head injuries, shattering his pelvis and breaking his arm and eight ribs, doctors placed Chris in a clinically-induced coma.

He spent nearly six months in a wheelchair while rehabilitating.