It seems inconceivable now, but until about the mid-1960s it was quite common to see celebrities hawking cigarettes like it was no big deal. In fact, many radio, TV, and movie stars literally owed their livelihood to sponsorship from tobacco companies. Imagine seeing someone like George Clooney or Angelina Jolie smiling widely in cigarette ads exhorting you to pick up a carton of Marlboro. Weird, isn't it? Anyway, here's a gallery of 20 such ads from the 1930s through the early 1960s featuring movie and TV stars, as well as famous athletes, using their star power to get you to buy cigarettes and cigars. Most of these ads are courtesy the Stanford Research into the Impact of Tobacco Advertising site.