Yesterday, millions marched in Washington D.C and all over the world in what was potentially the largest single-day demonstration in recorded U.S. history. March For Our Lives was organised by Florida high school students who lost 17 of their friends and classmates to a gunman just last month.

Joining the protest were celebrities such as George and Amal Clooney (who previously donated $500,000 to the cause), Kim Kardashian and Kanye West, Selena Gomez, Miley Cyrus, Reese Witherspoon and Laura Dern.

Below, the best celebrity sightings of the day.

Miley Cyrus

Never Again! Gonna post pics from DC on my tumblr ! ❤

A post shared by Miley Cyrus (@mileycyrus) on

Lady Gaga

Selena Gomez

Jessica Alba

Khloe Kardashian

Reese Witherspoon

We hear You. We Hurt for You. We will Demand Change. @marchforourlives

A post shared by Reese Witherspoon (@reesewitherspoon) on

Taylor Swift

Amy Schumer

Kim Kardashian

Demi Lovato

Laura Dern

@everytown @marchforourlives

A post shared by @ lauradern on

Via Marie Claire Australia