Billy Joel and his long-term girlfriend, Alexis Roderick, are expecting their first baby together.

A spokesperson for the 65-year-old musician confirmed the news to People.com saying: "Billy is thrilled to become a dad again."

The couple began dating in 2009 and sparked engagement rumours earlier this year with a source telling The Star: "They're looking at a summer wedding. He's happier than ever."

Joel already has a 29-year-old daughter with ex-wife, Christie Brinkley.