You'll have to find out in a second.
Before we give you the link, let's recap!
James Magnussen won the qualifying round, but had to go up against some stiff competition in American Nathan Adrian. Two-time gold medallist Yannick Agnel looked tired as seventh fastest (48.23) into the final.
So who won gold?
Was it James? Nathan? Yannick? Did someone else rise to the occasion??
Find out HERE if you want to spoiled!
[Image via AP Images.]