Happy 38th birthday to the one and only Yoo Ah-in! On this day, October 6th, you have officially entered the world of being a 38-year-old. But we all know age is just a number for you, because you continue to rock our socks off with your amazing acting skills and dazzling charm. Keep shining and entertaining us for many more years to come. Cheers to being 38 and fabulous!