Billy Joel wed his long time girlfriend, Alexis Roderick, during a surprise ceremony at his annual Fourth of July party. New York State Governor Andrew Cuomo presided over the nuptials.

Joel's former wife, Christie Brinkley, posted her congrats via Instagram, writing, "Congratulations to the glowing bride and groom."

Joel and Roderick "surprised guests at their annual July 4th party by exchanging vows in front of their family and close friends," a rep for Joel told People magazine.

Another insider told reporters that the pair are expecting a child this summer.

"Billy is thrilled to become a dad again."

It's rumored that the baby will be a girl, however a rep said that they "opted to keep any further details of her pregnancy under wraps until their new addition makes an official debut."