Michael Buble and wife welcome second child

Singer-songwriter Michael Buble. Photo / Getty Images

Michael Buble's wife Luisana Lopilato has given birth to the couple's second child.

The Bubles announced the exciting news on the 40-year-old musician's Twitter account on Friday, posting a photo of their newborn son resting on mum's chest as the proud singer stands over them.

A caption accompanying the family shot reads: "And then there were 4. Introducing Noah's little brother Elias Buble".

Buble and Lopilato are now parents of two - they welcomed their first child, Noah, in August, 2013.

The Haven't Met You Yet singer tied the knot with the 28-year-old Argentinian model and actress in 2011.

And then there were 4. Introducing Noah's little brother Elias Bublé@lulopilato #family #blessed #brothers pic.twitter.com/34YdlXDCOP

— Michael Bublé (@MichaelBuble) January 22, 2016

Just before confirming Lopilato was pregnant again last year, the family experienced an horrific scare involving the health of their eldest son Noah, who was taken to the hospital in June after suffering severe burns when he was exposed to scalding hot water.

Lopilato told Argentine publication Luz the accident occurred after he climbed up onto a kitchen counter and grabbed a container of boiling water.

Although doctors feared Noah would need surgery to help him recover from the burns, the little boy bounced back, and to honour the excellent medical assistance Noah received, Buble has been making regular visits to the children's hospital where his son was treated.

"We spent all that time in the hospital watching other kids come in every single day with the same thing," the Feeling Good singer told Britain's Daily Express newspaper.

"It gives you perspective, so now I spend a lot of time at the children's hospital.

"It makes me thankful because there are so many kids and families who have had it far worse. There is nothing worse in the whole universe than your kid hurting. I try to remind (my wife) Lu that we are lucky - that it could have been worse."

- AAP