Ciara has given birth to her first child with husband Russell Wilson, E! News reported.
The singer posted on Instagram early Saturday morning about the news, announcing the name of her baby girl.
"Dear Sienna Princess Wilson," the caption read. "No matter how big the wave, we will always be your calm in the storm."
The Seattle Seahawks quarterback posted the same picture and caption on Twitter.
Ciara said that Sienna was born at 7:03 p.m., weighing 7 pounds, 13 ounces.
The couple married last summer in England and announced they were expecting their first child together during the fall. This is Wilson's first child. Ciara has a young son from a previous relationship with rapper Future.