"Happy 35th Birthday to the one and only Katherine Schwarzenegger! 🎉🎂🎈 It's crazy to think that just 35 years ago, the world was blessed with your presence on December 13th. You may have inherited some of your dad's muscles, but you definitely have your own unique and amazing charm. Wishing you a day filled with love, laughter, and all your favorite things. Here's to another year of dominating life like the boss lady you are. Cheers to you! 🥂 #KatherineSchwarzenegger #35thBirthday #Blessed 🎉🎂👑"