Celebrities Who Change Their Names

Since there was already a more famous Michael Douglas in Hollywood, Keaton took notice and changed his last name to what you see today.

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Before the world knew the 'Mission: Impossible' star, Tom Cruise was born Thomas Cruise Mapother IV.

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The 'Black Swan' herself came into the world as Natalie Hershlag due to her Israeli heritage, and went to the more flowing Natalie Portman.

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The stunning actress who's virtually everywhere in Hollywood nowadays didn't always have the untamed last name. Olivia Jane Cockburn was her name before she went with the more suitable Olivia Wilde.

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The Aerosmith frontman and "American Idol" judge went by Steven Tallarico before replacing his last name with Tyler.

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Wouldn't we all like to change our names? Well, some of us would, but a majority of the name changers that are around today come in the celebrity variety. Take a look and guess some of these famous celebs who have made the big switch!