Ciara and Russell Wilson have welcomed a son, Win Harrison Wilson.

The singer, 34, shared a video on Friday singing happy birthday to her newborn, who weighed 8 lbs 1 oz. at birth.

"Happy Birthday WIN!!! Mommy & Daddy Love You! Win Harrison Wilson," she wrote in a caption of the post, announcing she gave birth Thursday.

MORE: Ciara and Russell Wilson reveal they are having a boy in amazing family video

Win is Ciara's second child with the Seattle Seahawks quarterback. She gave birth to their first daughter, Sienna, in 2017 and has a 6-year-old son, Future, from a previous relationship.

VIDEO: Ciara sings 'Happy Birthday' to son Win moments after giving birth
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Win Harrison Wilson weighed 8 pounds and 1 ounce.

Wilson also shared a selfie with Ciara and Win.

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The Grammy Award-winning singer announced her pregnancy in January and has documented her journey regularly for her 25.8 million Instagram followers.

She also gave "Good Morning America" some details on what it's like being pregnant during the COVID-19 pandemic in April. Watch the full interview here.

MORE: See the beautiful photo Ciara shared to announce her 3rd pregnancy

Watch the video Ciara shared to announce she was expecting a boy below:

VIDEO: Ciara and Russell Wilson reveal their baby's gender in amazing family video
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The singer, who revealed in January that she is pregnant with her third child, shared a heartwarming video on Tuesday to announce the exciting news.