It's official, Castle fans! Our favorite show will be back in September, and according to show creator Andrew Marlowe, we have lots to look forward to in Season 5.

When we got wind of the good news last night, we let out a few squeals of fangirl joy before hopping on Twitter to see what everyone was saying. The Internet was all abuzz with celebratory tweets from fans across the world to Castle's very own cast and crew.

Here's how ABC's finest reacted to the Season 5 pick-up:

Andrew Marlowe: "Just landed in Amsterdam to news we've been renewed! That takes the sting out of the layover. Congrats to entire Castle team. Thanks ABC."

Nathan Fillion: "The pick up is official. Castle. Season 5. Cheers." (Retweeted by Stana Katic)

Seamus Dever: "Congrats to the Castle family on season 5."

Molly Quinn: "Thank you all. Celebrating with some milk and @SnookiesCookies :)"

Penny Johnson Jerald: "@ABC_Publicity Thank you ABC! What a ride next season is going to be!"

How did you react when you heard Castle had been renewed? Tell us in the comments below!


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