News Emma Watson, Britney Spears and More Stars Celebrate International Women's Day -- See the Pics! By Jennifer Drysdale 2:16 PM PST, March 8, 2017 This video is unavailable because we were unable to load a message from our sponsors. If you are using ad-blocking software, please disable it and reload the page. 26:10Kendall Jenner, Bella Hadid and More Speak Out on International …01:34John Cena and Nicole Byer Want Celebrities on 'Wipeout' -- Find …02:562022 PSIFA: Jessica Chastain, Kristen Stewart and More Reflect o…10:42‘Darcey & Stacey’: Darcey and Stacey Dish on Season 3 and Darcey…04:24'Euphoria' Cast on Their Close Bond Amid a 'Chaotic' Season 2 (E…01:09Remembering Sidney Poitier: Viola Davis, Barack Obama & More Pay…11:30How Lady Gaga Is Approaching New Projects After 'House of Gucci'…02:10Oliver Hudson Gives Behind-the-Scenes Look at ‘The Cleaning Lady…01:28'Wipeout' Contestants Fight Their Way Through Obstacle Course to…07:43How John Cena Brought a Likeability Factor to His ‘Peacemaker’ C…01:22'This Is Us' Sneak Peek: Jack Is Worried His Kids Will Forget Hi…03:34Watch Cardi B's Morning Routine With Kulture and Newborn Son03:44Adrienne Houghton Gives an Inside Look at ‘I Can See Your Voice’…08:52Jessica Chastain on ‘Zero Dark Thirty’ 10 Years Later and PSIFA …04:15Kim Kardashian and Pete Davidson Spotted Together on Bahamas Get…03:04Cardi B Shares Adorable Video of Offset Cradling Son01:51Denzel Washington Pays Tribute to Sidney Poitier (Exclusive)11:07Jamie Lynn Spears on Britney's Conservatorship and Finding Her O…11:34Bernice King Reflects on Her Father Martin Luther King Jr.'s Leg… The women of Hollywood are joining together to celebrate International Women's Day! From Emma Watson and Britney Spears, to Madonna and Serena Williams, women everywhere are spreading girl power on social media. RELATED: Katy Perry Celebrates International Women's Day With Powerful Message: Now Is the Time We 'Lift Each Other Up'Watson, dressed in a red outfit in support of women, took to Twitter on Wednesday to reveal that she would be handing out feminist books. "Today I'm a red-striking ninja book-fairy out to spread some wise women's words @the_bookfairies #IWDOurSharedShelf #IWD #adaywithoutawoman," the Beauty and the Beast star wrote.Today I'm a red-striking ninja book-fairy out to spread some wise women's words @the_bookfairies#IWDOurSharedShelf#IWD#adaywithoutawomanpic.twitter.com/sOBhrHremg— Emma Watson (@EmmaWatson) March 8, 2017 RELATED: Emma Watson 'Quietly Stunned' by Photo Shoot Feminism ControversySpears, meanwhile, paid tribute to the "fierce" women who inspire her, as Williams and Madonna shared their own posts in support of International Women's Day.View this post on InstagramA post shared by Britney Spears (@britneyspears) View this post on InstagramA post shared by Serena Williams (@serenawilliams)View this post on InstagramA post shared by Madonna (@madonna)See more posts below:View this post on InstagramA post shared by Eva Longoria Baston (@evalongoria)View this post on InstagramA post shared by Vin Diesel (@vindiesel) View this post on InstagramA post shared by Lana Parrilla (@lanaparrilla)View this post on InstagramA post shared by Adele (@adele)Thank u to all of the strong women who fought & continue to fight for change. #InternationalWomensDay— Kim Kardashian West (@KimKardashian) March 8, 2017Because we ALL deserve to be lifted up! Today, let’s celebrate the strong, incredible, GOOD women in our lives. #InternationalWomensDay— Khloé (@khloekardashian) March 8, 2017women rule! — Kendall (@KendallJenner) March 8, 2017View this post on InstagramA post shared by Bella 🦋 (@bellahadid)Happy #InternationalWomensDayor, as it's often called on here, #WhyIsn'tThereAnInternationalMensDay (There is: November 19th)— J.K. Rowling (@jk_rowling) March 8, 2017I am strong, I am invincible, I am woman 🎶 Happy #InternationalWomensDay to all you female badasses!— Katie Couric (@katiecouric) March 8, 2017View this post on InstagramA post shared by Karlie Kloss (@karliekloss)View this post on InstagramA post shared by Gordon Ramsay (@gordongram) View this post on InstagramA post shared by Sophia Bush (@sophiabush)Women! Rise up! Change your profile picture in solidarity. #ADayWithoutAWomanpic.twitter.com/uMfYJfkM5x— Alyssa Milano (@Alyssa_Milano) March 8, 2017A favorite quote of mine by Maya Angelou for #InternationalWomensDaypic.twitter.com/dofSNtdAzi— Sabrina Carpenter (@SabrinaAnnLynn) March 8, 2017View this post on InstagramA post shared by Krysten Ritter (@therealkrystenritter) WATCH: Meghan Markle Shares Inspiring Message on International Women's Day: 'To Always Knowing Your Worth' Meghan Markle Shares Inspiring International Women's Day Message: 'To Always Knowing Your Worth' This video is unavailable because we were unable to load a message from our sponsors. If you are using ad-blocking software, please disable it and reload the page.