Selena Gomez has taken to Twitter to share the official news that she is a big sister and to reveal the little girl's name. It is …

…Gracie Elliot Teefey.

What a lovely, classic name, right?

The 'Come & Get It' singer's tweet is below:

Gracie was born to Sel's mother Mandy and her husband Brian Teefey. She is their first child together.

Mandy suffered a heartbreaking miscarriage in December 2011 and it was believed to have been a girl as well.

We cannot wait for Sel to share a photo of her little sister. We bet she's a looker who will be as pretty as her big sis!