The 29-year-old model and fiance Wiz Khalifa welcomed their "perfect" first child Sebastian Taylor Thomaz into the world!
Wiz, 25, tweeted: "Happy Birthday Sebastian "The Bash" Taylor Thomaz!. Everyone welcome this perfect young man into the world."
Amber hinted she was close to her due date last week when she announced that she would not be online again until after their baby's arrival, as she wanted to focus on relaxing.
Writing on her Twitter page, she said:
"Hey Rosebuds & Rosestuds Muva won't be back on twitter until Wizbud is born I need 2 meditate & focus on our Lil boy Luv u talk soon - Muva (sic)."
She previously revealed that she was planning to give birth in a pool at home and wanted Wiz to be the first person to touch their child.
Amber said: "I don't want no medication. We take home birthing classes to teach us how to do it, and we're gonna have our midwife, and when the baby's head comes out, he's gonna be Dr. Wiz.
"He's gonna be the first person to touch the child. No doctors, no gloves."