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Plus: More reactions from the cast
Castlestar Stana Katic posted a heartfelt message to fans after the ABC drama was canceled, after eight seasons.
"Your devotion to our show has carried us for these unforgettable 8 seasons," wrote Katic, who would not have been a part of any potential ninth season. "I'm lucky to have met and worked with and for the lot of you. I will always be grateful. BIG HUG."
Love, S pic.twitter.com/oZUENEj2XQ
ABC announced they were not renewing Castle Thursday night, which means Monday's season finale will double as a series finale. Castle's showrunners had prepared for this decision by creating an alternate ending for the episode that will give a sense of closure, as opposed to leaving fans with a cliffhanger.
Castle finale promo: will Beckett die?!
Castleco-stars Molly Quinn (Alexis), Seamus Dever (Ryan), Jon Huertas (Esposito) and Toks Olagundoye (Hayley) shared their own reactions to Castle's cancellation on Instagram and Twitter.
It's been a blast, a pleasure and an honor! One of the most fun and fulfilling years of my entire life! I am SO grateful for it ALL😍 #Castle
#Castle was a cornerstone of my life. Hollywood's not an easy town. As a cast & crew we were all very lucky 2 have
A safe environment to learn.
Thank you @ABCNetwork for giving a carrottop kid of 14 an amazing start
the right chemistry, love & support 2 create a wonderful show...
...that had success in a landscape of network TV where long runs R like unicorns. So thank u 2 the fans for giving me my own personal unicorn!
Castle's series finale airs Monday at 10/9c on ABC.