Bidder Adrian ‘Mr Lambo’ Portelli and girlfriend Karlie Butler Celebrate the Arrival of their First Child

Controversial The Block bidder Adrian ‘Mr Lambo’ Portelli welcomed his first child with girlfriend Karlie Butler on Monday.

The millionaire property investor, 34, took to Instagram on Wednesday to share a loved-up gallery of photos showing him tenderly cradling his newborn son.

One adorable snap shows a shirtless Portelli smiling at the camera as he sits in a chair gently nursing the baby and another captures him gazing lovingly at his child.

‘Welcome to the world little man,’ Portelli wrote next to the photos – he did not reveal his son’s name.

Many of Adrian’s celebrity friends were quick to congratulate him on the amazing news. 

Controversial The Block bidder Adrian ‘Mr Lambo’ Portelli (pictured) welcomed his first child with girlfriend Karlie Butler on Monday

The Block 2022 winners Omar and Oz both posted love heart emojis and influencer Mitch Orvall wrote: ‘Congrats brother’. 

Portelli told the Herald Sun he was over the moon at becoming a first time father. 

‘He was four days over. It’s an amazing, overwhelming experience,’ he said. 

The millionaire property investor, 34, took to Instagram on Wednesday to share a loved-up gallery of photos showing him tenderly cradling his newborn son

In November, Portelli threw a lavish baby shower for his pregnant partner Karlie. 

He shared some photos on Instagram of the bash, which showed him posing with blue baby blocks and blue balloons.

Another was of the very expensive push present he bought his partner –  a luxury $300,000 Aston Martin sports SUV.

Portelli and his girlfriend Karlie Butler (pictured) announced on social media in September they were expecting their first child

‘Push prezzie well deserved for putting up with me,’ he wrote next to the photo. 

In September, Portelli hosted an elaborate gender reveal ahead of the birth of his first child.

The couple held the gender reveal at his $39 million penthouse in East Melbourne.

Portelli is a multi-millionaire property investor and online promotions guru with an estimated net worth of $350million. 

‘Welcome to the world little man,’ Portelli wrote next to the photos

READ MORE: ‘Mr Lambo’ Adrian Portelli reveals exactly why he bid an extra $100,000 against himself at The Block auction