Before he was George Costanza on Seinfeld, Jason Alexander was just a young actor trying to make it — and in 1985, that meant starring in a McDonald’s commercial for the McDLT. With full musical theatre energy, he sang and danced through the streets, hyping up a burger that promised to keep “the hot side hot and the cool side cool.” It’s cheesy, it’s catchy, and it’s peak '80s ad magic. #JasonAlexander #Seinfeld #McDLT | RetroBlonde075