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. 24:09Kendall Jenner, Bella Hadid and More Speak Out on International …03:22Gigi Hadid and Yolanda Hadid Want to ‘Move On’ After Alleged Zay…03:05Bella Twins Discuss Wedding Plans, More Babies and Possible Retu…03:40Andy Cohen on New Book, Dating Life and Possibly Having More Kid…02:19Chloe Bailey on 'Performing My Heart Out' and Making Her AMAs De…02:24Anitta on Performing With Gloria Estefan and Working Out for ‘En…08:03Busy Philipps Reflects on Birdie's Coming Out and What She's Tha…02:39Hilary Duff Reacts to Joe Jonas and Sophie Turner's 'Lizzie McGu…04:56Asher Angel on Being in Love and Getting Into Country Music (Exc…03:29Katie Thurston Cries While Discussing Her Breakup With Blake Moy…03:25Adele Gets Emotional as Son Angelo Watches Her Perform Live for …12:26‘90 Day Fiancé’: Sumit Goes Behind Jenny’s Back and Sabotages Ma…03:28Kim Kardashian Jokes About Her Three Divorces During Speech at F…02:36Bradley Cooper and Irina Shayk Are in a ‘Great Groove’ Co-Parent…02:04Shawn Mendes and Camila Cabello Call it Quits After 2 Years Toge…03:33Meghan Markle Reveals What Her Kids With Prince Harry Are Really…02:21Sam Asghari and Britney Spears Want ‘the Biggest Wedding in the …02:08Princess Charlene of Monaco Steps Down From Royal Duties to Seek…02:13Halle Bailey Gushes Over Sister Chloe's Solo Success (Exclusive) 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.