Jack Osbourne is a dad!

The 26-year-old son of rock legend Ozzy Osbourne, and his fiancee Lisa Stelly have welcomed their first child together.

His baby was actually due to arrive last Wednesday, April 18, but on Friday, April 20, Lisa tweeted, “Still pregnant 🙁 apparently I made too lovely of a home in there! #overit  #comeonbaby.”

An editor for the UK’s Hello magazine first revealed the news on Twitter with the following tweet:

“HELLO! can exclusively announce the safe arrival of @MrJackO & @lisamarstelly ‘sbaby girl Pearl weighing 8lb 6oz. Love & congrats to them!”

Both Jack and his sister Kelly re-tweeted the message confirming the happy news of the fashionably late baby who was born earlier today.

Jack had announced that he and his fiancee were expecting a baby back in mid-October just two weeks after they became engaged.

Pearl is the first child for the couple, and the first grandchild for Sharon — Jack’s father, Ozzy, already has four grandchildren from the children of his previous marriage.

“I am going to be the grandmother from hell because I am going to spoil this baby so bad,” grandma Sharon announced. “My son and Lisa are going to be like, ‘Get her out of here!’”

Big congratulations and well wishes to the happy couple!