True (Co-Star) Love: Stana Katic and Nathan Fillion (PHOTOS)

Castle and Beckett finally hooked up in the Season 4 finale of Castle, but what's Stana Katic and Nathan Fillion's relationship like in real life? Forget those silly feud rumors, because these co-stars have no trouble showing their affection for one another.

As you ogle the following photos, pretend that Stana and Nathan are in character. Trust us: it will make you giddy.