Alicia Keys and Swizz Beatz are going to be a family of four.

The couple celebrated their four-year wedding anniversary by revealing some big news - the 33-year-old "Girl on Fire" singer and her Grammy-winning producer husband are expecting their second child together.

Keys made the announcement on her Instagram page by posting picture of her husband cradling her growing baby bump and captioned the picture, "Happy Anniversary to the love of my life @therealswizzz !! And to make it even sweeter we've been blessed with another angel on the way!! You make me happier than I have ever known! Here's to many many more years of the best parts of life!"

The expecting father posted a similar photo on his Instagram that shows him kissing his wife on the arm and wrote, "Love is life & life is love and we're so excited for another GIFT from up above. Happy Anniversary my Goddess 4 years of greatness & cheers to 100 plus more inshallah @aliciakeys."

The musical duo tied the knot on July 31, 2010 on the French island of Corsica and are already parents to three-year-old son Egypt Daoud Ibarr Dean, who will turn four in October. In 2013, Keys told ABC News that she has been thinking about extending her family.

In May, MediaTakeOut reported that the singer was pregnant after an insider claimed she refused to have a drink at the New York Met Gala. Earlier this year, Keys was reportedly pictured sporting a baby bump at The Beatles' 50th Anniversary concert.