Nathan Fillion's Response to Stana Katic Leaving Castle Is So Bittersweet

Still reeling from the news that Stana Katic is leaving Castle? Not only is it a bummer that she won't be on the show anymore, but it's also borderline anxiety-provoking to think about how the show will continue without Beckett. Her costar Nathan Fillion has responded to the news, and if you're a fan of Caskett, it might bring tears to your eyes.

Meanwhile, Katic tweeted this to her fans:

Caskett will live on in our hearts.