I forgot one. There was once a picture in the National Geographic magazine of a guy who did look like me. I’ve forgotten all the details but I think it must have been an advertisement and not a feature. The resemblance was uncanny.
Mine worked in a “Food 4 Less” grocery store in Atlanta not far from where I lived. I once met him and, yes, he did look a lot like me - a bit younger and a bit shorter.
We were enough alike, though, that one of his coworkers came up to me while I was shopping and reminded me that my shift had changed I had to work that weekend.
FWIW, I think Jennifer Grey was far, far prettier as a “before”. 
If I had said it, it would be a compliment.
We were visiting family in Germany and, as these things happen, decided to go to someone’s birthday party at 1am.
Here, one am would be nothing going on.
Not there.
Not for a 50th birthday party. ( And, when it is your birthday there YOU pay for the booze. And then at the end of the night your drunken friends toss wads of money at the barkeep for the party to help you pay the bill. )
So, we enter this building, a sport club, which is like a VFW hall in size and capacity and it is BLARINGLY LOUD and DARK and BOOOZY AND PACKED with DRUNKEN GERMANS.
We were introduced IN A VERY LOUD SHOUTING MANNER to the BIRTHDAY BOY and he looked like my husband, just a few years older. The resemblance was unnerving and every one asked if Mr. Ujest was the Birthday Boy’s Brother.
I have a picture somewhere of it all.
Mine was in 1997, when the Jackie Brown movie was just released. I was walking through the local video store trying to find a movie to rent when I did a double take of a cut-out of Bridget Fonda. I was always hearing how much I looked like her but I never really saw the resemblence until that day. I honestly thought there was a mirror there for a second and then realized that it was not myself I was staring at. It was extremely freaky and I will never forget that day.
When I was in middle school or maybe just starting high school the australian movie “Flirting” came out. People kept coming up and asking me if I was in that movie. No I didn’t resemble a young Nicole Kidman, more like a young Noah Taylor. I guess I kind of still do, but less so.
Later on, I was active in local community theater and went to see a show that I was not in. I was looking at the cast photos and realized that one of the leads reminded me of someone, but I couldn’t quite put my finger on it. Eventually it dawned on me that he looked like me. A fellow actor put it best when she said **** looks like a stretched out version of sjc.
In both cases I would say there was only a slight but uncanny resemblance, I’m still waiting for an extremely uncanny resemblance.
Several years ago, I was in the other room when SWMBO and the kids started yelling at me to come out to the living room. I ran out there and saw the twin brother I never knew I had sitting in the hot seat on Who Wants To Be A Millionaire? It was spooky - extreme physical resemblance, voice sounded the same, speaking and gesturing mannerisms the same…and we both bottomed out on the $250k and took the money. Figuratively on my part of course. 
He was from someplace in West Virginia, IIRC.
I’ve never met the man, but Nate Mendel, bass player for the Foo Fighters, travels the world impersonating me.
Not met him myself, but mine’s a bad dude.
Called a taxi once and when it turned up, the driver initially refused to let me in - seriously; he looked at me as a walked to the car door, went white, locked the door and said something like “I ain’t fucking letting you in, Dave”. It turned out that he lived in a suburb of Nottingham called Clifton and thought I was a neighbour of his who had something of a bad rep. It took a couple of minutes to convince him that I didn’t have a clue what he was on about and I ended up being let in.
Couple of years later, I was working as a painter in Clifton. At the end of the day, me and my workmates were waiting at a bus stop when a car pulled up. Out of the car came two plain clothes coppers who walked right up to me, called me by the bad dude’s name and went as though they were gonna escort me to their motor. My workmates did a good bit of convincing there, else I’d I’ve had a wee trip to the nick.
My sister must have met him once, too. I got a bollocking off her for being an ignorant twat because she’d seen me in a mall and went to talk to me, but I blanked her and walked off. Only I hadn’t been to that mall.
Oh, and an ex of mine once got a 'phone call from her best mate to inform her that she and her husband (who both knew me quite well) had just been on a bus, only a few seats away from me as I sat smooching some lass. Despite my having been in all day, the main thing that got me off the hook for that one was that the bloke they saw was clean shaven, while I’d grown a beard since the last time they’d seen me.
Heh. When I was a freshman in high school, there was a senior who looked just like me. So much so, that the first couple days starting out high school, I’d be going down the senior hallway and seniors I didn’t know would act very friendly and familiar to me, putting their hands on my shoulder and engaging me in conversation as if we’d be friends forever. Wow, this school is really friendly towards freshman, I thought. It was only about three days later that I realized they weren’t the welcoming committee or anything – they just mistook me for this guy named Russ. The resemblance was frightening.
A related story, one time in high school I was walking over to a friend’s house, when I saw two guys sitting in a gray Mustang parked at the curb. They were wearing black baseball caps (which I assumed to be White Sox caps) and, from behind, looked exactly like two friends who lived just up the street, one of whom owned the exact same kind of gray Mustang, both of whom were Sox fans. I open the back door, walk into the car, shut the door and say “Hey guys, what’s going on?” Two perplexed individuals, who were certainly not my friends, turn around and there was this moment of awkward and stunned silence as we all try to make sense of the situation. I sheepishly exit, muttering, “shit, wrong car” under my breath and, when they regained their wits, yelled something along the lines of “get the fuck out of the car.” Oops.
The closest thing to a doppelganger I have is my best friend.
We get asked if we are sisters all the time. The first thing out of the wedding planner’s mouth at the dress rehearsal was ‘I didn’t know you had a sister!’.
We don’t, she’s an only child and I have a brother.
I have webbed toes. According to an African myth, that means that I had a twin but I killed and consumed him in the womb. I have yet to meet my Doppelganger, so perhaps I have already conquered!
I’ve been getting told I look like a certain actor for an average of about once a week for the last seven or eight years. People I’ve never met, people I’ve known since high school, all in between, etc.
I was sitting at the front desk and suddenly Mike Tyson walked in carrying a bunch of flowers. I wondered “Why is Mike Tyson walking in my office with flowers?” Talk about your surreal moments.
It turns out it wasn’t Mike Tyson, but the boyfriend of an agent who had just started working here that day. But the resemblance was uncanny, down to the gold teeth.
I’ve seen myself on the tv twice. Once dancing on Top Of The Pops, the other in the background of a news story. Weird, I tell ya!
I look a lot like Gwen Wright, the architecture professor on the PBS program History Detectives. I rarely watch it (even though I work in public television), and when the show first came out, I caught a glimpse of one of the publicity programs and thought it was a picture of me. Look at my profile and see if you see a resemblance. The picture I’ve linked doesn’t look a whole lot like the picture of me in my profile, but like those “separated at birth” photos, if you hunted I bet you could find two pictures where we look exactly the same.
It would be fun to meet her at some PBS function, though. Not that I ever get to travel for work, though. 
EDIT: Well for ease of comparison, here’s the picture of me I was talking about: Miss Ellen
Wow, you do look a lot like her, but I think there is something too pinched with her look so you are much more attractive.
I met my doppleganger and she isn’t evil, but she is a lot of fun.
My mom’s best friend was widowed for many years, and recently she met a new beau and they married. He has two adult children from his previous marriage.
His son looks somewhat similar to my brother, but his daughter looks exactly like me. When they first visited, everyone commented on the strong resemblance. I had heard about it a lot, but didn’t quite believe the extent of it until I met her myself. Our looks, taste in clothes, and mannerisms are all strikingly alike. She is a little taller. MY OWN MOTHER has mistaken her for me at a distance, and not really that far a distance either.
I also have a friend that I look NOTHING like in person. However, in photographs we look very similar. We went to the same grade school, so when we look at pictures from when we were little kids, we have a hard time figuring out which one is which. This seems so odd to me, because again, in person, we look nothing alike. Other people have commented on this as well.
Mine too!
One day, I was organizing my husband’s porn on his computer (I like to organize stuff, don’t ask). As I was perusing, I saw a face that looked exactly like mine. It was only the top half of her & she was clothed.
I’m not some great looker or anything. She looked more like girl-next-door-in-a-schoolgirl-skirt than Ms. Silicon-boob-queen.
Very odd, indeed.
I must have a common face, because it is not at all uncommon for people to think that they know me. A friend once was annoyed that I “ignored” him in the parking lot of the VFW. (I wasn’t there.) A few years ago when I was recovering in the hospital one of the nurses swore that I was her cousin. Even after I denied it and my mother denied it she still went and checked my chart to see my name. I have grown used to it.
I can’t decide whether it’s odder that you organize your husband’s porn or that he considers a picture of a fully clothed woman who looks like you to be “porn”. You guys are cute.