Many athletes took to social media to show their support for the anti-gun violence March For Our Lives demonstration in Washington, D.C., which was organized by survivors of the school shooting that killed 17 in Parkland, Fla. on Valentine's Day.
Here's a roundup of posts from some of America's most prominent sports stars.
If you can get out & support @AMarch4OurLives today I am proud of this generation standing up for injustice & having their voices heard, making real change. The world is listening. Some may not know me but I stand with you @Emma4Change #marchforourlives @MSNBC @mtv @naacp @NBA pic.