Do you have a celebrity doppelganger?

Some people say that everyone has a twin, or a double, somewhere in the world - does your double happen to be a celebrity? Is there such an uncanny resemblance between you and someone famous that you've been mistaken for him or her on the street? Do all your friends and family members tell you that you look like someone they saw in a movie? If you have a celebrity twin, we want to hear from you!