Samantha Futerman is an actor that made videos on YouTube in Los Angels. Anaïs Bordiers is a fashion designer in London. One of Anaïs' friends came across one of Sam's videos on YouTube. Her friend sent her the video of Sam, and Anaïs contacted Sam through Facebook. They Skyped and found out that they not only looked identical, but shared the same birthday and were from the same part of Korea. These Korean adoptees were identical twins that had grown up in different countries. They wrote a book (Separated @ Birth) and are releasing a documentary (Twinsters) in 2015.
[Picture from Koreatimes article linked below]