BILLY JOEL AND GIRLFRIEND ALEXIS EXPECTING BABY GIRL

Billy Joel GF Expecting Baby

BILLY JOEL, 65, to be dad again  — 29 years after his ex- Christie Brinkley gave birth to their only daughter Alexa.

RadarOnline was the first to break the happy news, as Billy will soon be on diaper duty with his much younger girlfriend, Alexis Roderick, 33.

Not only that but the “Uptown Girl” singer and his lady love, a former financial banker for investment firm Morgan Stanley, have already named their baby. 

“They want to call the baby Madison,” a source told RadarOnline, revealing: “It’s a girl!”

It is unclear if she’ll be named for popular Manhattan venue – Madison Avenue – but it wouldn’t surprise Billy’s New York fans one bit.

 A spokeswoman for Billy confirmed, “Billy Joel and his girlfriend, Alexis Roderick, are expecting their first child this summer. The singer has one daughter, singer/songwriter Alexa Ray Joel. The couple, together since 2009, opted to keep any further details of her pregnancy under wraps until their new addition makes an official debut.”