By Alexandra DeRosa
Updated Mar 14, 2015 @ 6:15 pm
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Is having red hair the luck of the Irish? Some may say so. But what about those who aren't Irish? Red hair is the most rare, unique color and it gives Hollywood actresses an extra edge—it's a trademark! But some shades of red, like auburn and deep strawberry blond, are just so gorgeous that one can't help but wonder: Is that a dye job? Read on to get the scoop on who's au naturel and who hits up the salon. You may be surprised!

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The Verdict: Natural Chastian's gorgeous scarlet locks are her own! The award-winning actress told InStyle, "as a child I didn’t like it because it made me different. But as I grew older and more comfortable, it became a badge of honor.”

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The Verdict: Dye job That's right. This fiery red head, whose been red for what seems like most of her life, is actually a natural blond. Now that's a good dye job.

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The Verdict: Natural If you ever had any doubt that Moore wasn't born with it just take a look at this picture of the actress and her daughter, whose hair is as equally red.

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The Verdict: Dye job While Stone pulls off a crimson color incredibly well, this may not come as a surprise since the actress has also dubbed blond and brunette hair throughout her career.

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The Verdict: Natural The Australian actress was born a redhead! Her strawberry blond strands complement her alabaster skin, of which Kidman told us she has protected from the sun starting at a very young age by "staying in[doors] far more than most kids."

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The Verdict: Dye job Without a dye job, Messing would be a brunette! Need proof? Check out her yearbook picture.

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The Verdict: Natural When the actress was younger, her color was more strawberry blond, but today the actress works a deep auburn tone.

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The Verdict: Natural While the actress has dabbled with blond highlights, she's naturally a Titian-haired beauty.