'Castle' Season 6 Finale Sneak Peek Previews Wedding Jitters

05/10/2014 09:04 am ET | Updated May 10, 2014

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.

The "Castle" Season 6 finale airs Monday, May 12, at 10 p.m. EDT on ABC.

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