The couple's little girl, Sienna, turned 3 on Tuesday.
Sienna was the spitting image of her football star dad in a sweet video Ciara posted on her birthday.
"It's your birthday, pretty girl," the singer gushes to her daughter in the cute clip. "Do you feel happy? ... I love you! How old are you today?"
"I'm 3 years old!" Sienna softly replies.
"Our Princess Sienna turns 3 today! I’m so happy," Ciara captioned the video. "Never imagined I could have a bond like what we have with my little girl. She lights up the world! #HappyBirthday Mommy’s little Princess ?."
Russell also shared a post honoring his daughter on Instagram.
"THANKFUL. Since Day 1. You have been a true beaming light in our lives Sienna. We love you! All the way to the moon and back!" he captioned a precious throwback pic. "Daddy’s girl. Happy Birthday My Love. 3 years old! Daddy & Mommy’s favorite number! @Ciara."
Ciara and Russell announced they were expecting their second child together in January. This will be the third child for Ciara; the singer is also mom to 5-year-old son Future Zahir, whom she shares with ex Future. The family recently revealed that they'll be adding a baby boy to their family.
See more in the video below.