When you think celebrity twins, you undoubtedly think of Mary-Kate and Ashley Olsen first, followed perhaps by Tia and Tamera Mowry or Joel and Benji Madden.
There are a bunch of others you probably don't know about, however.
From actors and supermodels to athletes and political scions, more than a dozen stars grew up sharing a special connection with a twin sibling of their own.
While some duos parlayed that very fact of their existence into fame, other famous stars have lesser-known identical or fraternal twins living out of the limelight.
Check out 19 stars you may or may not realize have twins ...