Many Castle fans are speculating that the show's main romance may be ending in the upcoming eighth season.

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TVLine posted a new blind item on Tuesday, revealing that in the upcoming TV season, a couple beloved by fans will be breaking up. The report also states that the show runners are prepared for backlash from fans and that the show is "aging." Additionally, the show is on either CBS, NBC, Fox, ABC or The CW and it is a one-hour drama.

Many commenters wrote that it was probably Castle and it would be a breakup between Castle (Nathan Fillion) and Beckett (Stana Katic), the show's core relationship.

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While the identity of this blind item remains a mystery, a lot of evidence points to the idea that Castle and Beckett are heading towards a split.

Recent reports have detailed the arrival of a new security analyst named Hayley in season 8, who will apparently spend a lot of time with Castle.

Additionally, new co-showrunner Alexi Hawley said in an interview with Entertainment Weekly that things would be shaken up in season 8.

"We just want to get in there and try to tell some really dynamic stories," Hawley said. "Going into season 8, it feels like it's time to shake things up a little bit."

There was also the drawn out process of signing Fillion and Katic for another season. The stars finally signed one-year deals in the final weeks of the last TV season, as cancellation speculation was rampant.

None of this definitively proves that the blind item is referring to Castle and Beckett, but fans are seeing that this possibility might be adding up. Keep up with Enstars as this story unfolds.

Castle season 8 premieres Monday, Sept. 21 at 10 p.m. ET/PT on ABC.