Serena Williams may have retired from tennis, but the GOAT has been booked and busy. The proud mom recently released a children's book, "The Adventures of Qai Qai," which is inspired by Olympia's own baby doll name and follows the adventures of the doll and the little girl who loves her.  

In the adorable video, Olympia continues to think that the little girl in the book is her. Serena starts brushing through her daughter's hair, telling her, "Ooh girl, we're going to do your hair today."

Serena suggests they try the same look as the book's main character, to which Olympia says, "that's me."

In a later scene, she reads a line from the book which says, "get it, baby girl, work that runway," and encourages Olympia to do the same.

"Work that runway!" Serena shouts as Olympia struts around, stumbling briefly before regaining her stride.

She then runs back to her mom, sits next to her, and says, "That was cool!"

This is the cutest thing you'll see today!