Katie Ledecky is the world's most decorated female swimmer. Here's what to know about her life, career, and medals.

• Katie Ledecky is poised to add more medals to her collection at the 2024 Paris Olympics.
• Ledecky, now 27, made her Olympic debut in London in 2012, when she was just 15.
• This year's Summer Games could solidify Ledecky as one of the all-time greatest swimmers in history.

Olympic freestyle swimmer Katie Ledecky is one of the most decorated Olympians in US history and could become one of the best swimmers ever.