"Stana has been my partner all this time and I thank her for creating the character of Beckett who will live on for all of us as one of the greatest police officers on television," he added. "I wish her well, and have no doubt she will succeed in everything she pursues. She will be missed."
According to Deadline, the decision for Katic and her Castle co-star, Tamala Jones, to leave the series was made by ABC and ABC Studios.
“Kate Beckett has been a beloved character on our hit series Castle for the past eight years," ABC said in a statement to ET. "We are grateful for Stana Katic’s talent and dedication to the series and we hope to continue our relationship."
The news of this cast shake-up has sparked an outrage with both the Castle fans, as well as with those closest to the show.
Castle creators and real-life spouses Andrew Marlowe and Terri Edda Miller, who stepped down as showrunners last year, also expressed their shock on Twitter.
Marlowe wrote, "Heartbroken. There are no words. #nmc."
Katic has yet to speak out on social media about her exit from the show, but the fan-favorite actress released a statement on the matter.
"Rather than distract from what was an amazing experience I would just like to say that I'm very grateful to ABC for giving me the opportunity to be a part of a much beloved show. Thank you to the fans," she said.
Will you continue to watch Castle without Kate Beckett? Do you think there should be a season nine? Share your thoughts with @ETnow on Twitter!