The singer had kept the news hidden from media from past two months, reported Us magazine.
The newlyweds stepped out together at the 2015 Grammys, posing with one another on the carpet and looking happily in love in matching black ensembles.
The surprise nuptials are the second for the Grammy winner, who was previously married to Laura Dern for five years.
In 2010, the couple split citing irreconcilable differences. Together they are parents to son Ellery and daughter Jaya.