Michael Bublé has welcomed a son with his wife Luisana Lopilato.

The 37-year-old singer and his 26-year-old spouse named their bundle of joy Noah after he arrived on Tuesday at 2.26am.

The baby was born in Vancouver, Canada, and Michael shared a snap of the happy family via Instagram.

'Overjoyed and filled with gratitude at the arrival of our son,' he captioned the shot.

As his Argentine actress partner cradles the sleeping tot while smiling, the new father can be seen beaming while kitted out in a disposable hair cap and blue doctors' scrubs.

The duo, who married in March 2011, announced they were to become parents in January with a video message.

But before that he coughed up the news to Reese Witherspoon as he couldn't contain his excitement.

'I had just found out we were expecting. It was the greatest day of my life, so I just said, 'You know, I'm having a baby!'' he shared about who he told first.

The pair found out the gender of their baby when the new pope was selected from his wife's native country.

However, they clearly did not take inspiration for a moniker from the occasion.

'She said, 'It's a sign!' But there is no way we are going to call him Frank, even if it did work well for Frank Sinatra,' Michael previously joked.

Prior to the birth, the Canadian crooner explained how determined he is to be the best dad possible.

'I just don't want to look back and say, 'God, I should have been there more,' because I have a feeling that I'll never look back and say, 'Jeez, I should have worked more,'' he said.