Serena Williams' husband and tech entrepreneur Alexis Ohanian recently posted an adorable picture of himself and daughter Olympia Ohanian on social media, and lamented that she is growing up too fast.Williams and Ohanian welcomed their daughter Alexis Olympia Ohanian Jr. on September 1, 2017.The pair first announced that they are expecting a child in April 2017 after Serena Williams' stunning 2017 Australian Open victory in January against sister Venus Williams 6-4, 6-4. The win was one for the history books, considering Serena Williams was pregnant when she won the title.Reddit co-founder Alexis Ohanian took to Twitter to share a selfie with Olympia as he gushed over how quickly she is growing up."Self-portrait of a father who doesn't want her to grow up too fast." Ohanian captioned the image.AlexisOhanian7️⃣7️⃣6️⃣@alexisohanianSelf-portrait of a father who doesn't want her to grow up too fast.249266Self-portrait of a father who doesn't want her to grow up too fast. https://t.co/QHeEJfJt80After Olympia's birth, Williams was still active on tour until last year's US Open and her young daughter attended many matches to support her mother.A look at Serena Williams and Olympia Ohanian's cutest moments on social mediaSerena Williams after winning the 2020 Women's ASB ClassicSerena Williams, apart from being one of the most recognized sporting figures in the world, is also a proud mother. Throughout the years, Williams has shared many cute moments with her family on social media and has also dedicated an Instagram account to her daughter.Williams recently visited an art gallery with Olympia, calling her the best art viewing partner."Art viewing with @olympiaohanian is the best," Williams captioned the post View this post on Instagram Instagram PostWilliams also shared a few images of her family attending a friend's wedding. View this post on Instagram Instagram PostThe 23-time Grand Slam Champion also shared a cute video of Olympia raiding her closet and trying out a fun piece. View this post on Instagram Instagram PostWilliams also shared a few moments of herself with Olympia in matching pajamas as she recorded their nighttime shenanigans. View this post on Instagram Instagram PostThe American star also shared a family picture on a golf cart as they relaxed on a farm together. View this post on Instagram Instagram PostOlympia was also present at Williams' farewell match at the US Open last year where the legend bid adieu to the sport after losing to Ajla Tomljanovic in three sets, 5-7, 7-6, 1-6.