Celebrities who look like other celebrities
From Sarah Palin to Leonardo DiCaprio, the celebrity universe is a diverse population. But sometimes genetics align to create two stars who share an uncanny resemblance. See what you think.
Bradley Cooper & Paul McDonald
Many "American Idol" fans think former competitor Paul McDonald  looks a lot like "The Hangover Part II" star Bradley Cooper. McDonald was recently voted off the show.

America Ferrera & Jordin Sparks
"Ugly Betty" actress America Ferrera  and "American Idol" winner Jordin Sparks  resemble each other despite their five-year age difference.

Mila Kunis & Vanessa Hudgens
"Black Swan"  actress Mila Kunis  and "High School Musical" star Vanessa Hudgens bear a striking resemblance to each other.

Chace Crawford & Ian Somerhalder
Crawford stars in a hit CW show. Former "Lost" star Somerhalder has his own popular CW show. They've even dated the same actress. So, how are we supposed to tell them apart?

Selena Gomez & Demi Lovato
The Disney stars and best friends  have had to spend some time apart, with one of them in rehab and one dating a teen pop superstar.

Megan Fox & Angelina Jolie
Despite her objections, Megan Fox  has often been compared to Oscar winner Angelina Jolie. Maybe it's their shared love of tattoos.

Jeffrey Dean Morgan & Javier Bardem
One is an American TV and movie star. The other is an Oscar-winning actor from Spain  So, how did they end up looking so much alike?

Kim Kardashian & Nicole Scherzinger
The voluptuous  Kardashian sister  may be following in her musical doppelgänger's footsteps.

Natalie Portman & Keira Knightley
The actresses' resemblance  led to Knightley's playing Portman's look-alike in this 1999 movie.

Bill Paxton & Bill Pullman
The "Big Love" star  and the "Independence Day" president  are so often confused that there are websites devoted to the phenomenon. Can you tell them apart?

Courteney Cox & Demi Moore
Brunette actresses Courteney Cox and Demi Moore are only two years apart  and both married younger men. See pictures of them together.

Rachel McAdams & Elizabeth Banks
Rachel McAdams, star of "The Notebook," and "30 Rock" actress Elizabeth Banks are four years apart  and were born in different countries  but they still look a heck of a lot alike.

Sarah Palin & Tina Fey
When Sen. John McCain tapped Sarah Palin as his running mate voters of all stripes asked, "Now, who does she remind me of?" Answers ranged from Megan Mullally to Peggy Hill, but it was Fey who won an Emmy for her impersonation.

Andy Roddick & Seann William Scott
Stifler at Wimbledon? Seann William Scott, who played "American Pie" party dude Steve Stifler, certainly lacks Andy Roddick's high-power serve to make center court at the All England Club, so it must be Roddick who recently lost in this round.

Alexis Bledel & Robin Tunney
Rather than resembling the woman who played her mom, little Rory from "Gilmore Girls" grew up to look like Agent Lisbon on "The Mentalist". One of these actresses is a killer poker player.

Will Ferrell & Chad Smith
Ever seen a Red Hot Chili Peppers video or photo and wondered: What's Will Ferrell doing there? Actually, that's drummer Chad Smith, who's mistaken for the comic actor so often  that he wears T-shirts printed with this.

Ellen DeGeneres & Owen Wilson
Take a look at producer-musician Vance DeGeneres. Now, actor Luke Wilson . Neither resembles his sibling as much as Ellen DeGeneres and Owen Wilson do each other, right? Ellen voiced this animated character, and Owen did this one.
Chris Rock once introduced Depp at an awards show as "the rich man's Skeet Ulrich." Point taken. The stars of "21 Jump Street" and "Jericho" do indeed look alike. Except when Depp is Capt. Jack Sparrow, who famously resembles this iconic rocker.

Paul Giamatti & Joey Slotnick
These two work steadily, but neither is a superstar. So, you're forgiven if you confuse Giamatti, star of "Sideways" and "John Adams"  with Slotnick, from "The Single Guy" and tons of other shows. Trivia: One of their fathers was an MLB commissioner.

Julia Roberts & Kyra Sedgwick
They're not sisters, they just played them in "Something to Talk About". By the way, Julia Roberts' real-life sister is producer Lisa Roberts Gillian. Kyra Sedgwick's brother is actor Rob Sedgwick, who once played an archery coach on this sitcom.

Hillary Clinton & Emma Thompson
Emma Thompson  played Susan Stanton, a character based on Hillary Clinton  in "Primary Colors". Now secretary of state, Clinton  is working to stop human rights abuses that Thompson also has spoken against.

Daniel Radcliffe & Elijah Wood
The dead ringers star in two of history's biggest film franchises. Radcliffe returns as the boy wizard in "Harry Potter and the Deathly Hallows". Wood gained fame as a hobbit in the "Lord of the Rings" trilogy.

Amy Adams & Kristen Wiig
When the "Enchanted" actress hosted Wiig's show, "Saturday Night Live," Adams shared her opening monologue with her doppelgänger and sound-alike. They then sang "What Is This Feeling?" from this Broadway musical.

Helen Hunt & Leelee Sobieski
It's the high forehead and eyes like apostrophes that link Helen Hunt, star of "Mad About You" and Leelee Sobieski, star of the TV movie "Joan of Arc." And by the way, this actor could be their brother. Now you can catch Hunt playing surfer Bethany Hamilton's mom in a new movie.

Leonardo DiCaprio & Eric Dane
Maybe it's because we remember DiCaprio as the "Titanic" lad or that homeless kid on "Growing Pains" and because Dane gained fame fully grown on "Grey's Anatomy" that Dr. McSteamy seems like an older version of Leo.

Emma Watson & Jennifer Jason Leigh
As seen in "Greenberg"  Leigh looks darn great for her age and could be Hermione Granger's American cousin. Watson, who recently quit college, has non-"Harry Potter" projects going, including acting in her boyfriend's music video.

Katy Perry & Zooey Deschanel
It's a little bit annoying, to be totally blunt," says actress Deschanel of being mistaken for singer Perry.  Deschanel, whose sister is this "Bones" star, sings in the duo She & Him.

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