The Rolling Stones frontman and his 29-year-old girlfriend welcomed their first son in New York today.
The singer's first daughter Alexa Ray shared the pictures on Instagram...
17th August 2015
We've had a first glimpse at Billy Joel's baby girl Della Rose and she's beautiful!
Alexa Ray, the singer's first daughter with ex-wife Christie Brinkley, shared pictures on the social networking site, Instagram.
There is a 29 year age difference between Alexa Ray and Della and both sisters share Billy Joel's dark locks.
Isn't she cute?
12th August 2015
Billy Joel and wife Alexis have welcomed a baby girl into the world.
The 66-year-old singer made the announcement on his Twitter this morning.
Della Rose, who weighs a healthy 7 pounds, 6.5 ounces was born at 2.40am.
Joel already has a daughter, Alexa Ray from his previous marriage to Christie Brinkley.
The couple were married on July 4th at a secret ceremony on Joel's Long Island estate.