When you’re the first born of Prince William and Kate Middleton, you’re bound to have a charmed life, and the soon-to-be-born baby already has a lullaby waiting.

Composer Paul Mealor wrote “Sleep On” for the Royal infant after having penned the wedding music for the Duke and Duchess of Cambridge’s nuptials.

Mealor explained, "After writing music for the Royal Wedding it seemed natural to provide the musical accompaniment for the next stage of the royal couple's journey together."

And classical singer Hayley Westenra recorded the track on her new album- "Paul and I got together to work on a song called Sleep On in honor of William and Kate's new arrival as it's such a joyous occasion which we can all celebrate."