Congratulations are in order for one of the biggest power couples in the music industry. Through Instagram, Swizz Beatz and his wife, Alicia Keys, just announced they're expecting their second child, and they shared the news on their fourth wedding anniversary.

"Happy Anniversary to the love of my life @therealswizz," wrote the 33-year-old singer on the picture-sharing website. "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 couple posted photos of the pregnant R&B star looking radiant, in a long bohemian styled white dress, while Swizz rocked black pants, a white top and a spiffy looking brooch. The veteran hitmaker also wished his wife of four years a happy anniversary as well.

"Love is life & life is love," wrote the Ruff Ryders affiliate. "And we're so excited for another gift from above above. Happy Anniversary my Goddess. 4 years of greatness & cheers to 100 plus. Inshallah"

The couple already has a 3-year-old son, Egypt Daoud Dean, together. Swizz is also a father to three other children from previous relationships.

Congrats Alicia Keys and Swizz Beatz on their bundle of joy.