Happy birthday to the incredibly talented and always kind Katherine Schwarzenegger! It's hard to believe you're turning 36 today, it seems like just yesterday you were a teenager writing your first book. But then again, with your amazing accomplishments like becoming a published author and mom to two adorable kiddos, you've definitely made the most out of your years. Cheers to another year of love, laughter, and more epic moments! Have a Schwarzen-flagging good time celebrating on December 13th.