The proud parents took to Instagram on Friday night to reveal the news of Sienna Princess Wilson's birth at 7 p.m. that evening.
"Dear Sienna Princess Wilson, No matter how big the wave, we will always be your calm in the storm. We Love You. Love, Mommy & Daddy. 7:03 pm 7 lbs 13 oz. 4.28.2017," Ciara captioned an Instagram shot taken by Russell of her looking at the ocean.
The footballer duplicated the note and shared it on his own page.
Fans have been anticipating the birth of the famous couple's baby for months — especially in recent weeks, when Ciara looked extremely pregnant as her due date approached.
The news of her pregnancy was announced back in October following speculation.
"I'm excited to finally share one of the greatest gifts of all that God could give," the 30-year-old singer wrote on her Instagram page on her birthday.
Ciara and the Seattle Seahawks quarterback married in July — just four months after getting engaged.
The couple publicly boasted about remaining celibate until marriage and were quick to brag about their sex lives once they tied the knot.
While little Sienna is the first child for the couple, Ciara has a 2-year-old son with her ex, the rapper Future.
I know one person who's not too happy about this …….