Hollywood Benjamin Buttons: 19 Celebrities Who Seem to Be Aging In Reverse

They say that movies are timeless. Well, upon further review, it might be the actors who star in them who will last forever. Whether it's just good genes, the money for upkeep, or a membership to an underground cabal of Hollywood vampirism that comes with their SAG card, some stars never seem to age, or, better yet, seem to get younger with time.

Check out these side-by-side comparisons of celebs through the years and see if you can pick out which photo is the older one and which is from present day. It's harder than you think. (Answers at the bottom.)

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Joseph Gordon-Levitt
Years between photos: 8

Jennifer Aniston
Years between photos: 9

Elijah Wood
Years between photos: 12

Halley Berry
Years between photos: 11

Robert Downey Jr.
Years between photos: 8

Cate Blanchett
Years between photos: 8

Will Smith
Years between photos: 10

Lucy Liu
Years between photos: 10

Tobey Maguire
Years between photos: 10

Gwen Stefani
Years between photos: 9

Jamie Foxx
Years between photos: 8

Liv Tyler
Years between photos: 10

Eva Mendes
Years between photos: 9

Pharrell Williams
Years between photos: 10

Kate Hudson
Years between photos: 10

Paul Rudd
Years between photos: 9

Naomi Watts
Years between photos: 9

Rob Lowe
Years between photos: 13

Patrick Stewart
Years between photos: 22

So, how'd you do? Check your answers HERE.

(Photos: Getty Images)