Monday marks Martin Luther King, Jr. Day across the country, meaning thousands will have a day off in appreciation for his work to promote racial equality.
But how much do you really know about one of the most important activists of all time? Chances are your town has a street named after him, but do you know how old he was when he died?
And we've all heard his famous "I Have a Dream" speech, but you'll never guess what his teachers thought about his public speaking skills.
For more fast facts, check out the video above from the Huffington Post.