Originally appeared on E! OnlineFamily outing? Aced.Serena Williams and her husband Alexis Ohanian arrived at Athlos' debut track and field event in London on Sept. 18 with the ultimate VIPs: their daughters Olympia and Adira.For the occasion, Serena looked faultless in a pair of jeans and polo sweater while Alexis looked dapper at her side in a tan blazer, dark red sweater and black trousers.As for Olympia, she looked adorable decked out in a varsity jacket and jeans, while Adira wore a tan colored two-piece set.The Sept. 18 event marks the international debut of Athlos, Alexis' new all-women track and field league. In addition to his role as founder, the league features an athlete-ownership model spearheaded by Sha'Carri, Gabby Thomas and Tara Davis-Woodhall.The league's debut event in London will feature seven events—a one mile, 100m hurdle, 100m, 200m, 400m, 800m races plus long jump—with six athletes competing in each. While the prize pot starts at $6,000 for everyone who places sixth, the top finishers will take home a whopping $65,000—and a crown made by Tiffany and Co.More from E! OnlineKim Kardashian Shares Esophagitis Diagnosis Related to Dad Robert Kardashian's Fatal CancerLady Gaga and Michael Polansky Baby's Name and Sex RevealedMillie Bobby Brown Welcomes Baby No. 2 With Husband Jake BongioviAlexis and Serena are no strangers to exposing their daughters to the power of sports, and the first-ever Athlos event in London is the perfect match.They're especially partial to platforming women's sports, with Olympia—whose first name is Alexis, after her dad—and her father attending a WNBA game together in New York City back in August. There, they watched the New York Liberty take on the Golden State Valkyries.And while the away team was ultimately victorious, the father-daughter pair had an especially trunk-tastic time thanks to the Liberty's mascot, Ellie the Elephant."Papa-Daughter basketball night with @bigellieliberty @nyliberty makes me realize all my teams need a mascot this awesome," Alexis wrote in an Aug. 27 Instagram post. "Thanks, Ellie, you made Jr's night!"Indeed, Olympia was all smiles as she sat next to Ellie alongside the seafoam green court.Read on for a closer look at their family...Smart and StrongSleeping BeautyMommy and DaughterPretty in PinkBaby's First HalloweenBath TimeBlingTeddy Bear CutieQuality Time With AuntiePow!TwinningNew Year's EveDress Up TimeSock Hop StyleCoolest KidTwinsiesSleeping BeautyTea TimeZoom SquadBig Sister AlertPrecious MomentsHole in FunTennis ToddlerFor the latest breaking news updates, click here to download the E! News App
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