The tennis star wed her partner, Reddit founder Alexis Ohanian in New Orleans.
The tennis champion’s note is addressed to her mother.
Alexis Olympia Ohanian, Jr. is officially an active member of the photo-sharing platform.
She also revealed the baby’s name.
The tennis master went into labour on Thursday.
Serena Williams And Her Baby Bump Are The Cover Stars Of The New Vanity Fair
Serena Williams Responded To John McEnroe’s Sexist Remarks With Two Tweets
Serena Williams announced her pregnancy on Snapchat.
Read Serena Williams's open letter on the barriers holding women athletes back.
Watch Beyoncé Bring Out Serena Williams For The Final Night Of The Formation World Tour
Serena Williams shared her thoughts on recent police killings in a post on Facebook.