‘Pure magic’: Bruce Willis and Demi Moore welcome Louetta Isley, their first granddaughter.

Officially, Bruce Willis and Demi Moore are grandparents!

Rumer Willis, the oldest child of the ex-couple, gave birth to a girl last week.

The new parents captioned a picture of their baby, whom they called Louetta Isley Thomas Willis, “You are pure magic,” and added, “We love you.”

“You are more than we could have ever imagined,” they wrote, “Born at home on Tuesday, April 18th.”

In December, Rumer and Derek made the first child-sharing announcement.