Castle and Beckett are getting married! The nuptials are right around the corner and in this exclusive sneak peek of the "Castle" Season 6 finale, we see that Beckett gets her own pre-wedding jitters. Turns out, she may have already been married to bartender Rogan O'Leary (Eddie McClintock) for 15 years after a drunken rendezvous in Vegas 15 years prior. It's about to get juicy. Take a look at the clip above.

Earlier this week, ABC renewed "Castle" for a seventh season, which will air in the fall.