Ciara made the announcement on her Instagram page:
Wilson posted the same picture on his Twitter page, writing, "Dear Sienna Princess Wilson, No matter how big the wave, we will always be your calm in the storm. Love, Daddy & Mommy."
Karen Mizoguchi and Jen Juneau of People noted Sienna is Wilson's first child and Ciara's second.
The couple announced in October they were expecting:
The timing of Sienna's birth in the offseason means Wilson will have plenty of time to play his role as new father before shifting some focus to training camp and the 2017 NFL season.