Luisana Lopilato and Michael Buble

It's a boy for Michael Bublé and his wife, Luisana Lopilato, the singer announced Tuesday.

Bublé posted a photo of himself in scrubs with his wife and their newborn son on Instagram. "Overjoyed and filled with gratitude at the arrival of our son Noah Bublé," he wrote. "Born this morning, August 27th at 2:26 am in Vancouver, Canada."

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This is the first child for the "Haven't Met You Yet" singer, 37, and the Argentine actress, 26, who wed in March 2011 after getting engaged in November 2009.

Bublé's most recent album, To Be Loved, hit stores in April.