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Updated: Mon, 25 Mar 2013 18:45:00 GMT | By Colleen Last
Stars who look younger than their years

Jim Parsons from The Big Bang Theory is 40

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Can you believe Jim Parsons, who plays Sheldon Cooper in The Big Bang Theory, is 40?! We can't.

Sure, some of the stars in this gallery may have had a nip or a tuck, but most are blessed with good genes and they work hard to say fit and healthy as the years march on.

Click through to see who else has drunk from the fountain of youth...