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 Now Playing hh:mm:ss 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 Instagram@madonna and @beyonce... 2 of the many women who inspire me. Always fierce throughout their careers. Thank you for being amazing 💖 Happy International Women’s Day everyone! #WomensDay #InternationalWomensDay #IWD #GirlPowerA post shared by Britney Spears (@britneyspears) on Mar 8, 2017 at 12:20pm PST View this post on InstagramProud to celebrate #InternationalWomensDay with @Brawnybrand by honoring those who continue to break down barriers #StrengthHasNoGender. Learn more about these incredible women on Brawny.com. #AdA post shared by Serena Williams (@serenawilliams) on Mar 8, 2017 at 5:38am PST View this post on InstagramThe Revolution Starts Now!!! ⏳🎥⏰🎉🎉🎉🎉 Happy International Women's Day!! 💘😂👑🌎🌍🌏🔥🔥🔥🔜♥️ @luigiandiango 🙏🏻 @voguegermanyA post shared by Madonna (@madonna) on Mar 8, 2017 at 1:55am PSTSee more posts below: View this post on InstagramInternational Women's Day is meant to celebrate the social, economic, cultural, and political successes of women while urging more gender equality! Today I wear red as I stand in solidarity with my sisters all over the world! Honored to speak today on a panel discussion on women in the workforce for #IWD2017! #EvaLongoriaCollectionA post shared by Eva Longoria Baston (@evalongoria) on Mar 8, 2017 at 9:17am PST View this post on InstagramGuess who is turning the big TWO this month? Haha. #happyinternationalwomensday #leadwithloveA post shared by Vin Diesel (@vindiesel) on Mar 8, 2017 at 12:18pm PST View this post on InstagramProud of my gender! I stand in solidarity with all women today! #internationalwomensday #wearred #equality ❤💋👠🌹A post shared by Lana Parrilla (@lparrilla) on Mar 8, 2017 at 12:54pm PST View this post on Instagram"Whatever women do they must do twice as well as men to be thought half as good. Luckily, this is not difficult" #internationalwomensdayA post shared by Adele (@adele) on Mar 8, 2017 at 3:00am PSTThank 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, 2017 View this post on InstagramMy best friend #happyinternationalwomen day So much love 💗💘🌷💕💓🎀🎉💞shoutout to all my ladies!!! I love you @yolanda.hadid 💪🏼💪🏼💪🏼💪🏼💪🏼 (shoutout to @anwarhadid in the belly)A post shared by 🦋 (@bellahadid) on Mar 8, 2017 at 1:48pm PSTHappy #InternationalWomensDayor, as it's often called on here, #WhyIsn'tThereAnInternationalMensDay (There is: November 19th)— J.K. Rowling (@jk_rowling) March 8, 2017Beyond excited that on #InternationalWomensDay I'm able to announce that I'm officially a patron of @womenforwomenUKpic.twitter.com/AfbYOEKRVM— Sophie Turner (@SophieT) March 8, 2017I am strong, I am invincible, I am woman 🎶 Happy #InternationalWomensDay to all you female badasses!— Katie Couric (@katiecouric) March 8, 2017 View this post on InstagramThis #InternationalWomensDay I wanted to honor a few of the brave and brilliant women whose life stories and accomplishments have inspired me (and countless others) to reach higher, work harder, and dare to do the impossible. Today we celebrate you, the icons, artists, nerds, explorers, activists who make our world better every day. Happy #IWD2017A post shared by Karlie Kloss (@karliekloss) on Mar 8, 2017 at 4:50am PST View this post on InstagramHappy #InternationalWomensDay to these beautiful ladies love you lots GxA post shared by Gordon Ramsay (@gordongram) on Mar 8, 2017 at 5:28am PST View this post on InstagramSolidarity. The Statue Of Liberty is dark today. #ADayWithoutWomen #InternationalWomensDay However you choose to express your solidarity -- striking, wearing red, making phone calls to your reps, only spending money at women-owned businesses (one of or all of these things) -- thank you. 👊🏼A post shared by Sophia Bush (@sophiabush) on Mar 8, 2017 at 5:20am PSTWomen! 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, 2017 View this post on InstagramToday is the day!! #daywithoutwomen !!! #internationalwomensday !! We stand with women around the globe as they stood with us on Jan 21st! Full disclosure: I have to go to work BUT we can support and show solidarity in other ways - wear red, social media black out (starting now), no shopping (unless small owned female run business), lift up all the women we can! However you can participate, big or small, you are important and critical and you will be missed !! 💪🏻❤❤ (photo @puppysaysmoo @nastyliberal )A post shared by Krysten Ritter (@therealkrystenritter) on Mar 8, 2017 at 2:46am PST 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'