Congrats!: Billy Joel Marries Alexis Roderick in a Surprise Wedding

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Billy Joel and Alexis Roderick are officially married!

The 66-year-old singer exchanged "I Dos" with Alexis, 33 — who is pregnant with the couple's first child — in front of close family and friends in a surprise ceremony on Saturday, July 4, Billy's rep exclusively confirmed to People.

The wedding — which was held at Billy's Long Island estate — was officiated by the "Uptown Girl" singer's longtime friend, Governor of New York Andrew Cuomo, 57.

Billy and Alexis in December 2013. (Photo Credit: Getty Images)

Also in attendance at the ceremony was Billy's 29-year-old daughter, Alexa Ray Joel (from his previous marriage to Christie Brinkley, 61), and his friend, actor Kevin James, 50.

"Congratulation [sic] to the glowing bride and groom. And to my daughter Alexa, who has a wonderful friend in Alexis! Wishing the growing family every happiness!" Christie wrote on Instagram following her ex's nuptials.

In April, Billy and Alexis — who began dating in 2009 — confirmed they were expecting a baby, due this summer.