Reese Witherspoon is one of those Hollywood celebrities who's seen as the "relatable" one and her adorable social media posts are proof of that.MORE: Reese Witherspoon shares rare family photos with lookalike mom Betty to mark special celebrationThe actress shared a rare throwback picture featuring both of her oldest children, son Deacon Phillippe, 17, and daughter Ava Phillippe, 21, as they all acted their silliest for the camera.WATCH: Reese Witherspoon's throwback marks big milestoneStanding together in front of Reese's beautiful beachfront home, the three smiled their biggest smiles and let the lookalike genes do the talking in front of the gorgeous setting sun."Turns out… goofy is genetic," she wrote in the caption with a DNA emoji.
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