CELEBS SHOW SUPPORT FOR THE MARCH

Countless celebrities lent their voices to the Women's March on Washington and its sister rallies this Saturday—the day following Donald Trump's inauguration. The event, which drew approximately 2.9m participants nationwide, is being called the biggest protest in U.S. history.

Alicia Keys and Janelle Monae spoke and performed in D.C., and Madonna delivered a fiery speech (as well as some songs, including "Express Yourself" and "Human Nature").

And many stars, such as Barbra Streisand, Miley Cyrus and Demi Lovato, came out in force for the L.A. gathering, which some sources are claiming drew crowds of approximately 750k. Moby DJ'd, and Juliette Lewis, U2’s The Edge, The Go-Go's Abby Travis and Rage Against the Machine’s Brad Wilk performed together, notably delivering a performance of “Pride (In the Name of Love).”

Of course, many other members of the music community spoke outwardly about their involvement and/or marched in solidarity.

Actors and tastemakers Jane Fonda, Natalie Portman, Jamie Lee Curtis, America Ferrera, Scarlett Johansson, Helen Hunt, Emma Watson and Laverne Cox were also among the participants.

See a selection of clips and posts from online below:

@happyhippiefdn @womensmarch @womensmarchla #womensmarchla #WMLA #whyimarch #hearourvoice #hh4pp

A photo posted by Miley Cyrus (@mileycyrus) on Jan 21, 2017 at 2:35pm PST

So proud to be a woman!! So proud of the women around the world who came together today for pro-choice! 💅🏽💕

A photo posted by badgalriri (@badgalriri) on Jan 21, 2017 at 7:14pm PST

Unity. Protection. Power. Progress. WOMEN RISE UP! Getting ready to march with my sisters! @womensmarch #WomensMarch pic.twitter.com/azkqAgfFfN

— KATY PERRY (@katyperry) January 21, 2017

So much love, pride, and respect for those who marched. I'm proud to be a woman today, and every day. #WomensMarch

— Taylor Swift (@taylorswift13) January 21, 2017

Today at the #womensmarch in LA introducing U2's The Edge!! We stand in solidarity #WomensMarchLA #Womensrightsarehumanrights

A photo posted by Demi Lovato (@ddlovato) on Jan 21, 2017 at 2:58pm PST

On way 2D.C. March🌼There r Marches ALL OVER THE🌎
After March we wi’ll Join Organizations‼️WE WONT SIT &🐝NOTHING‼️#WhyIMarch #WomensMarch

— Cher (@cher) January 21, 2017

The beginning of today's #womensmarch at #Sundance

A photo posted by John Legend (@johnlegend) on Jan 21, 2017 at 5:35pm PST

Women will change the world so proud of our queens!! #womensmarch pic.twitter.com/3eHWvmEO9l

— Sean Diddy Combs (@diddy) January 22, 2017

We march together

A photo posted by P!NK (@pink) on Jan 21, 2017 at 12:12pm PST

marched today and will forever stand for equal rights for free life. every human. every animal. anything with a heartbeat, you deserve a happy and free life. no one deserves to live in fear. love to everyone. 🦁🐪🐑🐆🤖🐅💅🐍🐱🐳👽👻🐼🐻🐯🐰🐒🐧🐦🐤🦄🐴🐗🐺🐥🐝🐠🐟🦂🦀🐡🐍🐅🐞🐜🐋🐊🐆🐡🐬🐳🐃🐅🐘🐄🐂🐐🐀🦃

A photo posted by Kesha (@iiswhoiis) on Jan 21, 2017 at 10:19pm PST