Billy Joel and his new wife Alexis have announced the birth of their daughter Della Rose, born on August 12 and weighing in at 7 lbs. 6 oz.

A source told reporters that Joel is "thrilled to become a dad again."

"Thank you for all the love! She's absolutely perfect! Busy, busy, here at the Joel home but I wanted to share a pic.

Love, Alexis," Joel's wife added via Instagram, posting a picture of the newborn.

During a Philadelphia concert last week, Billy shared pictures of Della Rose on the projection screens during a performance of "My Life."

Alexis and Billy surprised everyone by getting married over the July 4th weekend in a private ceremony.

The pair have been dating since 2009.