I have lots of twins out there in the world. When someone tells me that I look exactly like their cousin or old neighbor or college roommate, I just say, "I must have one of those faces..."
My celebrity twins, according to my friends and family:

My mom came home after seeing "The Man In The Moon" in 1991 and told me that there was a girl in it who looked just like me. It turns out that girl was Reese Witherspoon. After seeing "Walk the Line," my friend called me and said "It's not like you look identical, but she has your mannerisms." I did a play when I had long blond hair and every night, some one would say after the show, "Has anyone ever told you you look like..." and I finished their sentence. So yeah, that is so not my chin, but there must be something there.

Mireille Enos went to BYU before me. When I had red hair during three of my years there, everyone assumed I was her little sister. One time, a guy who had just got off his mission in one of my classes thought I actually WAS her and thought I/she was rude for not hugging him after all these years. At an acting competition just last month, a guy I had just performed with in the Syd Riggs show asked my friend why I was one of the judges for the competition. I ran into a girl I know at the gym and she said "Wow, I actually had to check the credits after 'Big Love' last night to make sure it wasn't you!" So yeah.
Alexis Grace. I don't watch American Idol, but the day after she was on that show, I received lots of messages about my identical twin. I have never seen her except for in pictures, so I'm not sure what the deal is.
My friend Maclain called me after watching "Bonnie and Clyde" and said, "Hi, Faye." He swears I am her, young again. A professor of mine at BYU had said the same thing, so I guess she makes the cut.
Babs Bunny. So only one person has ever said she was my twin--my friend in high school said I looked EXACTLY like her. I was mystified, and a little flattered. OK, so it's the teeth! I'm not an idiot!
So who gets your vote? Obviously, this is not a perfect science. Other people I have been told I look like are Angelina Jolie (that was during Little Women so it must have been the long dark braid) and Martina Hingis, the tennis player. That was my brother-in-law. Nice.