Watch the stunning michael phelps commercial everybody will be talking about

This new advertisement from Under Armour, led by Olympic star Michael Phelps, is one of the best commercials we've seen in the last few years. It's a brillaint mix of emotion and quiet inspiration.

Legacies like his are built over a lifetime like this. Michael Phelps returns for one last time. It's what you do in the dark, that puts you in the light. #RuleYourself #IWILL