Fans are celebrating Star Wars Day today, May 4. Here, actor David Prowse (center), who played Darth Vader in the first Star Wars trilogy, poses with costumed fans in France last week. Thierry Zoccolan/AFP/Getty Images hide caption

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That's a light saber, sir, not a phaser. (President Obama in September 2009, during a White House event promoting Chicago's bid for the 2016 Summer Olympics.) Roger L. Wollenberg /UPI /Landov hide caption

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One of makeup artist Stuart Freeborn's best-known characters, Yoda. Tim Whitby/Getty Images hide caption

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In this handout image provided by Disney, Star Wars creator George Lucas has a playful lightsaber duel with Jedi Mickey Mouse at Disney's Hollywood Studios theme park at Walt Disney World Resort in Lake Buena Vista, Fla., on Aug. 14, 2010. Disney announced Tuesday that it was buying Lucasfilm Ltd. for $4.05 billion. Getty Images hide caption

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When you think of Wookiees, you think of Chewy, don't you? Ethan Miller/Getty Images North America hide caption

itoggle caption Ethan Miller/Getty Images North America