I have “cousin-in-law” who is the spitting image of Billie Piper, if she were 13. It freaked me out when I met her at my cousin’s wedding.
Oh, I almost forgot, Himmler came into the library a few years ago. The day after I saw Downfall.
I used to work with a guy who looked like a strange hybrid of Bono and Patrick Swayze.
My husband’s friend TOTALLY looks like Beavis.
I was riding the bus one day and saw a guy who looked exactly like Tom Cruise, but with black hair.
I walked into the job office a couple of weeks ago, and someone said that I looked like Bill Gates. I said that if I was Bill Gates, the job office was the last place I’d be…
My cousin thinks I have an aspect like Stephen Fry–not necessarily looks, exactly, but possibly attitude or mannerisms. I’m not sure about that. She’s from Florida, so possibly my Canadian accent comes off as being more British?
At an audition in the early '8os, I saw a girl who was a dead ringer for Veronica Lake–even had long wavy blonde hair. Several people mentioned this to her and were appalled when she said, “People keep telling me that–who *is *she, anyway?”
My best friend/ex partner has actually been mistaken for Billy Corgan. Ever since he shaved his head the resemblance is eerie.
I work with Cicely Tyson (ca. 1980s) and the human-verse George Jetson and there’s a human who’s a human Alfred E. Neuman.
Speaking of celebrity doubles, did anybody read about the Nicholas Cage’s Civil War picture?
One of my good friends looks EXACTLY like Stewart Copeland, the drummer for the Ithe Police.
I’ve put pictures of them side-by-side, and people have not been able to tell who was who (whom was whom?)
I have a friend that looks exactly like Billy Joe Armstrong from Green Day. One year he dressed up as him for Halloween and people thought it was actually him.
He plays bass and may still be in a band but professionally I think he’s in the library sciences somewhere.
FtGKid2 is an exact double of an actor that was sort of famous for a while a few years ago. (Did some terrible movies that flopped so the guy’s now C-list.) The actor at his peak was also dating an extremely well known, award-winning and beautiful actress. So it was weird seeing photos of “my kid” with her.
In college I dated a guy who looked so much like Heath Ledger he occasionally got asked for autographs. God, he was a gorgeous, gorgeous man but he was dumber than a box of really stupid hammers so it didn’t last long.
Last year I met Juila Roberts and Sandra Bullock. Not at the same time though.
Many years before this guy was a customer where I worked.
I look a whole lot like System of a Down singer Serj Tankian. If I grew out my goatee I would be 100% spot-on. See my SDMB picture.
when i was younger, and hadvery short dark hair, i looked a lot like jamie lee curtis. i got stopped more often than i can count in stores and restaurants.
today with long blonde hair, i’ve had people ask me if i know how much i look like lee ann rimes. in fact, the nurse who was setting up my iv for a recent colonscopy stopped and stared at me when she got a good look at me.
already knowing what she was going to say, i smiled and piped up, ‘yeah, i know: lee ann rimes.’ 
I vote not a vampire. Look at the ears.
Same thing, except with me it was Tom Cruise. He even talked like him, and this was at the height of his Risky Business/Top Gun period. I wanted to eat him alive, but see above, re: bag of hammers.
My old neighbour had a friend who looked exactly like Christina Ricci.
Except my neighbour’s friend was certifiably nuts, and verbally attacked me once for something I didn’t even do. This girl was WACK.
I feel bad because I can’t stand watching Christina Ricci anymore because she reminds me so much of this crazy-ass girl. 
Yeah not bad. I was just watching Raising Hope yesterday thinking how great - and young - she looks still.
Well actually, just knowing her from The Goonies, I would have not said she looked “great” when I was a kid. But now she looks great, not like the mother of whoever that kid is on the show.
She’s also very short, at least compared to the guys on the show.
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In college I dated a guy who looked so much like Heath Ledger he occasionally got asked for autographs. God, he was a gorgeous, gorgeous man but he was dumber than a box of really stupid hammers so it didn’t last long.
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Same thing, except with me it was Christoper Reeve. Gorgeous, check. Bag of hammers, check.
When I was younger (and about 60 pounds thinner) I used to get Jodie Foster a lot. One time I was sitting in our car at a gas station waiting for my husband to buy a map or something and some lady was on a payphone and dropped it mid-sentance to come rushing over to me gasping “Jodie Foster!!” LOL
or maybe Hugh Laurie…