Alicia Keys and Swizz Beatz Are Engaged – and Expecting!

By Marisa Laudadio

UPDATED 05/28/2010 at 10:10 AM EDT • Originally published 05/27/2010 at 09:00 PM EDT

Talk about music to your ears! Not only are private power couple Alicia Keys and Swizz Beatz engaged to be married, they are having a baby.

The announcement comes after the two, together since fall 2008, attended Thursday night's Black Ball in London, which benefits Keys's Keep a Child Alive charity.

"They're very happy," says a friend of the couple, while reps confirm to PEOPLE the nuptials will take place "in a private ceremony later this year."

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Rapper Swizz Beatz (real name: Kasseem Dean), 31, has produced music for Keys, 29, and worked with artists including Jay-Z, Beyoncé, Jennifer Lopez and Gwen Stefani.

It will be the first marriage for Grammy-winner Keys – and their first child together. Swizz Beatz is father to Kasseem Jr., 3, and son Prince Nasir, 9, both from previous relationships.

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