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A photo from ten years ago shows two future Olympic teammates crossing paths.

The photo, taken at an autograph signing in 2006, captures nine-year-old Katie Ledecky meeting her swimming idol: Michael Phelps.

Now 19 years old, Ledecky is a Team USA swimming sensation in her own right. She's been dominating the Rio Olympics, winning gold medals in the 200m freestyle and the 400m freestyle and collecting a silver medal in the 4x100m freestyle relay.

Phelps, of course, is the most decorated Olympian of all time, winning his 20th and 21st gold medals this week.

As if the photo with Phelps wasn't enough, a second throwback picture shows an even younger Ledecky meeting another iconic U.S. athlete...

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