Bloopers & Behind The Scenes on Instagram: "When Julia Louis-Dreyfus Swore in Front of Elmo While filming a guest spot on Sesame Street, Julia Louis-Dreyfus accidentally let out a mild swear word after messing up a line right in front of Elmo. The crew burst into laughter, and even Elmo stayed in character, turning the slip-up into a funny, behind-the-scenes moment. Louis-Dreyfus later joked that it was one of her most embarrassing career moments. The story has since become a fan-favorite bit of