Have you ever watched a movie or TV show and sworn you have seen the actor somewhere else? We then spend a few minutes trying to match the name and face. You might even argue with a friend over two celebrity names. However, after a quick Google search, you realize that you confused the celebrity with another famous person. How does that even happen? You're not alone! Hollywood really likes to play games with us by having famous doppelgangers float around the industry.

Okay, it might be a silly coincidence, but there are more than a dozen instances where we have seen double in Hollywood. We can’t control the number of celebrities entering the growing world of pop culture. More shocking is that some celebs have more than one famous doppelganger.

The next time you feel like you’re having a celebrity déjà vu - don't worry, you’re not alone because there’s a likely chance that actor has a famous lookalike.

16 Steven Tyler, Melissa Rivers and Kathy Griffin

Probably the most shocking entry on this list, you can tell by the picture why these three had to be featured on this list together. Steven Tyler could easily be taken as Melissa's father or even older brother. The two even get paid big bucks to critique people!

Cathy Griffin may not resemble Steven Tyler as much as some of the other celeb lookalikes on this list but she sure does look like Melissa Rivers, maybe they have the same plastic surgeon?

15 Daniel Radcliffe and Elijah Wood

Actors can easily be mistaken based on looks, even when they’re stars of legendary fantasy movies! Ever since Daniel Radcliffe joined the Harry Potter movie franchise, many people have mistaken him with the older The Lord of the Rings actor, Elijah Wood. Back in 2002, Wood (in his 20s then) was being approached by fans thinking they were with Radcliffe (who was a young boy at the time). Awkward!

Even the actors know about it, Daniel shared on receiving a picture of Elijah Wood from a Japanese man when signing autographs on a red carpet premiere and due to language barriers, he quickly signed, “I am not Elijah Wood, signed Daniel Radcliffe.”

14 Isla Fisher and Amy Adams

There are not many famous female redheads in Hollywood, so it shouldn’t be that hard to tell them apart. However, Isla Fisher and Amy Adams look and even sound alike! Maybe it’s also because they’re close in age because it still takes a second for us to realize whether we’re watching the actress from Confessions of a Shopaholic or Enchanted.

The two actresses don’t really understand the confusion and according to People, Amy Adams said in a Vanity Fair cover story, “I get Isla Fisher all the time… I get it but don’t get it.” Sorry Amy, we see the uncanny resemblance too!

13 Stephen Colbert and Bob Saget

Stephen Colbert was the the host of The Colbert Report and will soon become even more famous when he takes over David Letterman’s spot on The Late Show. But people may confuse him with Bob Saget, the TV host veteran known for his past work on America's Funniest Home Videos.

These two could even pass as twins, possibly the most similar looking pair on this list, from their hairstyles to their glasses, it is hard to tell them apart. If late night TV doesn’t work out for Stephen, he can always fill in Bob’s spot on the new series reboot, Fuller House.

12 Zooey Deschanel and Katy Perry

Sometimes we believe that Zooey Deschanel and Katy Perry had to be separated at birth because they look like twins! While one is an adorable actress from New Girl and the other is a mega pop star with songs like Roar and Firework, they are not too far off in personality traits either. Zooey can sing very well, for example, and Katy can easily follow more vintage fashion trends too.

Come on, wouldn’t you love these two to pull off a Parent Trap? They can totally switch spots any day and we honestly might not even notice. Sorry, Lindsay Lohan, we are convinced we found the real life version of Hallie Parker and Annie James.

11 Ian Somerhalder and Chace Crawford

Is it a requirement for teen drama leads to look alike? Because when Gossip Girl and The Vampire Diaries were both on the air and on the same channel, it was difficult to tell these two apart. We think it’s all in the bone structure.

While Ian is still playing a vampire, maybe Chace can make a visit to Mystic Falls as a Salvatore relative to spice up the show. Hey, we wouldn’t even mind to see this pair play the sons of a Rob Lowe character in a movie. It would be any film cast director’s dream to cast that trio.

10 Erika Christensen and Julia Stiles

When Erika Christensen appeared on the TV show Parenthood, we swore she was Julia Stiles, who we know in great movies like 10 Things I Hate About You and Save The Last Dance. We can’t be the only ones! There are very little facial differences between these two lovely blondes. Are we sure they are not related?

Even if Parenthood has ended, Julia could have simply subbed in for Erika if she ever wanted a break from the set! We would also love to see Erika in more movies to have others understand our double takes – maybe she can play Julia Stiles’ sister?

9 Dane Cook and Skylar Astin

Do you remember back in the early aughts when Dane Cook was famous? Whether you love him or hate him, he now has a doppelganger floating around in Hollywood. Pitch Perfect actor Skylar Astin has a strong resemblance to the comedian. We’re surprised there hasn’t been a joke about it in the Pitch Perfect sequel. Well, if Dane ever needs an actor to play his younger self in an autobiographical movie, Skylar’s the guy to choose.

8 Keira Knightley and Natalie Portman

These two brunettes could be twins and they sure know it. Keira Knightley even had a small role in Star Wars Episode I: The Phantom Menace. She played Natalie Portman’s character decoy and we wouldn’t be surprised if the girls confused the cast and crew. In a Graham Norton interview, Keira added that she played her double in some wide shot scenes as well.

Even if she looks exactly like Natalie Portman, Keira Knightley hasn’t done so bad herself on making her name known in Hollywood with movies such as Pride and Prejudice and Atonement. But, we still have to think twice whenever we see one of these talented actresses in a film!

7 Jeff Daniels and Dave Coulier

Jeff Daniels looks pretty similar to Uncle Joey on the classic TV show, Full House. The physical resemblance between the two is actually really uncanny. Not to mention, they both have comedic backgrounds. You might remember Jeff Daniels playing alongside Jim Carrey in Dumb and Dumber. Now, you understand why we can’t tell these two goofballs apart!

Even if Jeff has done some more serious drama work on his recent series, The Newsroom, we still can easily confuse him with Dave. Also, we know that impressionist Dave Coulier would have no problem pulling off a good Harry Dunne from Dumb and Dumber - we honestly would love to see that!

6 Emily Osment and Carrie Underwood

You probably would have never imagined these two blondes to be celebrity lookalikes until their two pictures are side by side. The past Hannah Montana actress and American Idol alum were the last people to think that were doppelgangers.

But, after looking at them together, the same nose size and face shape is what makes them look identical. These two not only look similar, they even have the same birthday on March 10. Now, that’s freaky!

5 Javier Bardem and Jeffrey Dean Morgan

Even one of the most famous Hollywood doppelganger pairs sometimes know how much they look alike. Jeffrey Dean Morgan shares a very strong resemblance to the Spanish actor. Their fans barely notice the difference. And we might add that there’s a Robert Downey Jr. who can fit right in with this doppelganger pair.

In a HuffPost Live interview, Jeffery Dean Morgan feels honored to be recognized by great actors, but he might need to brush up on his Spanish when approached by Javier Bardem’s fans. We wonder how Javier feels when fans constantly tell him that they loved when he played Denny on Grey’s Anatomy.

4 Nina Dobrev and Victoria Justice

While Nina Dobrev played multiple doppelgangers on her hit show, The Vampire Diaries, it is so ironic she has one in real life too. We actually think it’s hilarious! The past Nickelodeon star Victoria Justice has a striking resemblance of Nina that makes us feel like we’re seeing double. From the long brown hair to the almost identical face shape, these two could not look anymore alike.

It’s been a while since we've seen Victoria Justice around and Nina Dobrev has sadly left her famous CW show. Well, if The Vampire Diaries fans still miss Elena Gilbert, they can simply beg the Victorious actress to take Nina’s spot.

3 Ben McKenzie and Russell Crowe

If there is a casting director looking for someone to play Russell Crowe’s brother (or even son), Ben McKenzie is your guy. Many of us remember him as Ryan Atwood in The O.C., but lately, you can find him starring as James Gordon in the recent television series, Gotham. It doesn’t seem bad to be compared to an amazing actor like Russell Crowe behind great films like Gladiator and A Beautiful Mind.

We wouldn't mind to see these handsome actors in a film together. These two can pull off the broody look really well too. Let’s see this happen, Hollywood!

2 Minka Kelly and Leighton Meester

How bizarre was it to see this doppelganger pair side by side in The Roommate? We still can’t believe that they co-starred together in a horror movie with the two leading roles.

There’s no wonder Leighton Meester went nuts! Seeing doppelgangers together in a movie rarely happens in the film industry. However, our eyes are still going dizzy on telling them apart.

Every time we see them together, the brunettes do look very alike with their long hair and identical lips. If they are ever in a movie again, one of them needs to change their hairstyle or something drastic to stop confusing us. We can’t handle it!

1 George Clooney and Clark Gable

Last but not least, here’s a celebrity lookalike pair that will blow your mind. The famous Clark Gable past away a year before George Clooney was born. So, is it possible that the handsome Clooney is his reincarnation? If you have seen Clooney in a classic thin mustache, you can easily think he’s the ghost of the old Hollywood actor.

Clooney had even come to terms with the celebrity lookalike in this charming Martini commercial. Isn’t it crazy how alike these men look? Now, we’re just waiting until he breaks the Internet by reciting that one famous line in “Gone With The Wind.” Frankly, George Clooney, we are dying to see this happen.

Sources: today.comhollywood.compopsugar.comsheknows.com

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