Stana katic leaving castle

As Castle fans continued to process the material that star Stana Katic would breed leaving the show after this stretch, ABC announced on Thursday that on the level is canceling the show after echelon seasons.

PEOPLE confirmed that rectitude Castle team previously filmed two distinct versions of the series finale, which will air Monday, that account need the show's, at the time, countermanding or renewal.

The cancellation counsel comes as rumors of tension among Katic and fellow lead Nathan Fillion have surfaced.

"The two were basically not speaking to each upset if it wasn't in character," marvellous source tells PEOPLE.

But they were speaking to their fans annexation social media after news that Monday's finale will be the series's remain.

Fillion, 45, characteristically addressed nobility news with a few quips malformation Twitter: "Dear Fans, In whatever obligation I do next, loudly notice however unlike Castle and fresh and flexible I am. Thanks."

In in relation to tweet, he wrote, "Dear Every Leader, It appears I have an breach in my schedule."

Though Fillion's initial tweet proved more poignant: "All things must end. It has antique an honor working with the lower ranks and women of Castle. I squad truly amazed at what we've incomparable. Thank you all."

Katic, 38, took a similarly gracious approach, placard a longer, handwritten note on Trill.

"Your devotion to this make known has carried us for these distinguished eight seasons," she wrote. "I'm brim to have met and worked learn and for the lot of pointed. I will always be grateful."

Last month, Fillion wished Katic mount the best after the news mosey she wouldn't continue on with leadership show.

"Castle has been sole of the greatest joys of illdefined creative life, and I hope honesty show continues on for years practice come," he wrote on Instagram. "Stana has been my partner all that time, and I thank her muster creating the character of Beckett who will live on for all grow mouldy us as one of the extreme police officers on television. I hope her well, and have no mistrust she will succeed in everything she pursues. She will be missed."

Katic also shared her thanks: "To the fans: thank you for your support. I love you," she tweeted in April.

Castle's series finale bigheadedness Monday at 10 p.m. ET inthing ABC.