David Fincher’s critically acclaimed “House of Cards” made Emmy history earlier this year when it became the first television show distributed solely online to be nominated for the ceremony’s top honors, snagging an impressive nine nominations in total. But according to insiders, its impressive run may already be coming to an end.

Netflix took an unprecedented chance on the series, investing $100 million at once for two seasons of the show without even demanding a pilot, the Wall Street Journal reported. By most standards Fincher’s “House of Cards” has been a runaway success. It’s outlasted the 1990 British miniseries on which it is based and more importantly, established Netflix as a viable competitor in original programming. Ryan Kavanaugh, CEO of the studio Relativity Media, told the WSJ last month, "Netflix really plays by their own rules. We've come to accept them as a contender.”

But in an interview with the entertainment blog GoldDerby this past Friday, executive producer Rick Cleveland revealed that it’s unlikely the hit political thriller will continue past its second season. He said that’s partly due to the busy filming schedules of its star-studded cast.

"'House of Cards' is only going to go a second season and I think that’s it," Cleveland said. "Kevin Spacey likes to do movies and Robin Wright likes to do movies.”

But according to IMDB, neither Spacey nor Wright have yet signed up to work on any upcoming films: The site does not list any films Spacey is currently attached to, while the status of Wright’s only upcoming film, “A Most Wanted Man” with Rachel McAdams and Daniel Bruhl, is already labeled as in post-production.

Cleveland, however, said he didn’t believe that either of the stars wanted to be locked down to a television show for the next few years. Despite his skeptical take on its longevity, show runners like Beau Willimon have expressed enthusiasm in continuing to write for “House of Cards” past the upcoming season, which is currently filming in Baltimore.

When a fan asked the screenwriter what his favorite moments from the series and the British show on which it was originally based were, Willimon responded in a tweet, “From the BBC when Urquhart first meets Mattie. From ours, I hope my favorite moment is one I'll write many seasons from now!”