The Spring Breakers star's mother Mandy Cornett welcomed her new daughter into the world on Wednesday and now the actress has taken to Twitter to make the announcement.
She wrote: "Momma, Brian, and me are all so grateful for all your well wishes. My lil sissy Gracie Elliot Teefey was born on June 12th. Luv you all XO."
Mandy divorced Selena's father, Ricardo Gomez, when the Love You Like A Love Song singer was five-years-old, before marrying Brian Teefey in 2006.
Demi Lovato was quick to "congratulate" her life-long friend on becoming a "big sister" when she made the comment on her own Twitter account today.
She tweeted: "@selenagomez IS A BIG SISTER!!!!!! Everyone congratulate her and her family!!!!!! #CONGRATSSELENA!!!!"
Speaking before Gracie's birth, Selena admitted she would "spoil the baby" and wanted to be "more like a cool aunt" in the future.
She previously said: "I want to be the best sister in the world. I'm really going to spoil the baby! I can't wait ... There's going to be a big age difference, so I think I'm going to be more like a cool aunt
She wrote: "Momma, Brian, and me are all so grateful for all your well wishes. My lil sissy Gracie Elliot Teefey was born on June 12th. Luv you all XO."
Mandy divorced Selena's father, Ricardo Gomez, when the Love You Like A Love Song singer was five-years-old, before marrying Brian Teefey in 2006.
Demi Lovato was quick to "congratulate" her life-long friend on becoming a "big sister" when she made the comment on her own Twitter account today.
She tweeted: "@selenagomez IS A BIG SISTER!!!!!! Everyone congratulate her and her family!!!!!! #CONGRATSSELENA!!!!"
Speaking before Gracie's birth, Selena admitted she would "spoil the baby" and wanted to be "more like a cool aunt" in the future.
She previously said: "I want to be the best sister in the world. I'm really going to spoil the baby! I can't wait ... There's going to be a big age difference, so I think I'm going to be more like a cool aunt
If you were Justin would you be upset that Selena was seeing her ex-boyfriend? Especially since he’s not currently anywhere near the two Disney stars?
Selena recently said in an interview that she and Nick are still good friends. Do you think they will rekindle their romance in the future? Or do you think Selena and Justin are just way too cute to break up anytime soon?
Oh, oh, oh, it's magic, you know
Never believe it's not so
It's magic, you know
Never believe it's not so
I never been awake, I never seen a day break
Leaning on my pillow in the morning
A lazy day in bed, music in my head
Crazy music playing in the morning light
Oh, oh, oh, it's magic, you know
Never believe it's not so
It's magic, you know
Never believe it's not so
Another sunny day, and dreamin' far away
Dreaming on my pillow in the morning
Never been awake, I never seen a day break
Leaning on my pillow in the morning light
Oh, oh, oh, it's magic, you know
Never believe it's not so
It's magic, you know
Never believe it's not so
Oh, oh, oh, it's magic, you know
Never believe it's not so
It's magic, you know
Never believe it's not so
Never believe
Never believe it's not so
It's magic, you know
Never believe it's not so
I never been awake, I never seen a day break
Leaning on my pillow in the morning
A lazy day in bed, music in my head
Crazy music playing in the morning light
Oh, oh, oh, it's magic, you know
Never believe it's not so
It's magic, you know
Never believe it's not so
Another sunny day, and dreamin' far away
Dreaming on my pillow in the morning
Never been awake, I never seen a day break
Leaning on my pillow in the morning light
Oh, oh, oh, it's magic, you know
Never believe it's not so
It's magic, you know
Never believe it's not so
Oh, oh, oh, it's magic, you know
Never believe it's not so
It's magic, you know
Never believe it's not so
Never believe