Courtesy of EW:
An ABC insider confirms that Lost will begin filming a wedding ceremony later today that is slated to air during the show's two-hour finale on May 13. Who's getting hitched? Here are a pair of clues: Actors of Asian-American descent are being sought to play extras, and the wedding will take place on the mainland, not the island. That pretty much rules out Jack/Kate or Sawyer/Juliet. "One theory is that it's a flashback to Sun and Jin's wedding," whispers a Lost insider. "But the wild rumor is that Sun and Jin's daughter will marry Aaron in the future."