Nathan Fillion Reacts to 'Castle' Ending: 'Mic Drop'

— -- After eight years, "Castle" ended its run last night.

Some SPOILERS.

We won't spoil the last show with all the thrilling details, but it ended with quite a bang and shots fired. Beckett and Castle reaffirming their love for each other and vowed they will be together (somehow).

After the final curtain call Nathan Fillion took to Twitter to address the finale and thank his fans.

"This was my last day on Castle. Ever," he wrote, followed by a live tweeting of the show.

There were some jokes.

"Well. That’s it," he tweeted last. "Thank you, everyone. What an incredible journey. (Mic drop) Castle out."

The show's creator Andrew Marlowe also weighed in on social media.

And then Stana Katic sent her love.