Any "Grey's Anatomy" super-fan is well aware of Bokhee, the show's unsung hero. She's a scrub nurse who is more often than not seen and not heard. Bokhee tends to deliver lines that are short, but impactful. It makes more sense once you realize that the character isn't an actor at all — Bokhee An is a real-life scrub nurse on and off camera.

Sandra Oh, who portrayed Cristina Yang on the series, revealed the shocking fact in a 2013 tweet. "The nurse in that scene, Bokhee, is a real surgical nurse. She's been with us since the beginning. She's like my 2nd mom, she's the best," Oh wrote. Bokhee has been featured in more than 200 episodes on "Grey's Anatomy" and has made appearances in every season since its debut. In fact, she's actually appeared in more episodes than stars like Oh, Dempsey, and many other long-time cast members (via IMDb).

Bokhee is still an active scrub nurse in real-life in Los Angeles. She's a bona fide Instagram star, boasting more than 600,000 followers interested in her behind-the-scenes shots from the show and beyond. It's amazing to see that someone with such a demanding job in real life also portrays their profession on TV, and brings some reality to a series that can often center around some unfathomable plot lines.