The Oscar-winner plays ruthless politician Francis 'Frank' Underwood in the new 13-part adaptation of the Michael Dobbs novel, directed by David Fincher (The Social Network, Fight Club).
"It's such an extraordinary series," Spacey said of the drama, which also stars Robin Wright and Kate Mara.
"It hasn't felt episodic - we got an order for 26 episodes, [but] it feels like I'm making a really long movie."
> Kevin Spacey House of Cards Q&A: 'My role is diabolical, delicious'
> David Fincher House of Cards Q&A: 'Kevin Spacey is just naughty'
Spacey told DS that the main draw of the project was the opportunity to work with Fincher, who helmed the first two episodes and also serves as executive producer.
"He pushes you as an actor," said the Hollywood star. "Neither of us have done that much television, although it is weird to say 'television' because we are oddly a new TV series that's not on television!"
The first season of House of Cards will be released in its entirety exclusively on Netflix on Friday, February 1.
> Robin Wright House of Cards Q&A: "It's definitely Fincher-esque"
> Kate Mara House of Cards Q&A: 'Kevin Spacey is so good at being bad'