Billy Joel is set to become a father for the third time.

The 68-year-old musician has revealed his wife Alexis Roderick - with whom he already has two-year-old daughter Della Rose - is heavily pregnant and is expected to give birth to their second child, and Billy's third in total, next month.

Billy - who also has 31-year-old daughter Alexa Ray with his ex-wife Christie Brinkley - said: ''We are due next month.''

And the 'Uptown Girl' hitmaker hopes his upcoming arrival will be as well behaved as his youngest daughter has been so far, as he's amazed the tot is sleeping through the night.

Speaking to the Belfast Telegraph newspaper, he said of Della: ''This one is pretty good. She sleeps through the night. I hope the next one will.''

The new arrival will come as the second child for the happy couple, who married in 2015 after almost five years of dating, and Alexis is Billy's fourth wife, after previous marriages to Elizabeth Weber from 1973 to 1982, Christie Brinkley from 1985 to 1994, and Katie Lee from 2004 to 2010.

And the 'We Didn't Start The Fire' singer will no doubt be hoping his relationship with his new baby is better than the one he shared with his eldest daughter, as he previously admitted it was ''heartbreaking'' to leave her after he split from Christie.

He said: ''When Christie and I got divorced I was missing my daughter, who would visit me and then have to leave.

''It was heartbreaking. I started to write what could have been a song, but the music was saying what I wanted it to say. It came naturally to me and it had all the emotion in it. Music speaks to me on its own. But I've never closed the door on writing songs.''