Their silhouettes - sawtooth-headed Bart, beehive-headed Marge, octagram-headed sisses Lisa and Maggie and empty-headed Homer - are iconic. So are those yellow skin tones, the goofy overbites, the ping-pong eyeballs with the black-dot pupils.
And it's not just the way they look. It's the way they talk, walk, work, eat, drink Duff Beer (Homer mostly) and belch (Homer and Bart mostly).
Everything about the Simpsons - the cartoon sitcom clan that have made Rupert Murdoch enough billions to buy the Wall Street Journal - is iconic. Since the show debuted (with a Christmas episode) on Fox TV in December 1989, the characters created by cartoonist Matt Groening have seeped into the collective consciousness like toxic sewage into Lake Springfield. Which is where the long-awaited The Simpsons Movie begins, actually: with deadly waste, courtesy of Homer and his new pet pig, fouling Springfield's water supply.