The genetically-blessed duo welcomed the arrival of their second son on Friday (22 January).
Proud father Michael, who is already dad to two-year-old Noah, shared a snap of his newborn baby on Twitter and revealed the little one's name.
He cooed: "And then there were 4. Introducing Noah's little brother Elias Bublé @lulopilato #family #blessed #brothers."
How blooming cute is baby Elias!
And doesn't actress Luisana look just lovely as she cradles her newborn in the snap?
Grammy Award winner Michael and Luisana married in 2011 and welcomed their first son Noah in 2013.
They announced the news that their family would be expanding again last summer.
One week after making the announcement, Michael shared a scan snap on instagram and said: "Good morning world ! Today we got the first look at the newest addition to our family ! #boy? #girl? #whocaresaslongasitshealthy."
Now their little boy has arrived and we couldn't be happier for Family Bublé!