Champion Serena Williams recently shared vacation photos from a family adventure to Niagara Falls, but fans found themselves doing a double-take over something completely other than the awe-inspiring natural wonder. They were gobsmacked at how much her 7-year-old daughter Olympia has grown up and how her looks are changing.

The four-time Olympic gold medalist and 23 Grand Slam singles title winner’s latest Instagram post offered a glimpse of her trip to the iconic waterfall with her daughters, yet it’s the rising third grader who has captured everyone’s attention with her rapidly evolving appearance and striking resemblance to men in her family.

The 43-year-old retired tennis champion has embarked on an ambitious year-long journey to show her daughters fantastic spectacles of the world,

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