House of Cards
Kevin Spacey will reprise his role as President Frank Underwood in “House of Cards” Season 5. Netflix

Two big names have just joined Netflix's “House of Cards” Season 5.

Oscar nominee Patricia Clarkson and Campbell Scott have been cast for “major roles” next season, according to The Hollywood Reporter.

While details of their roles are still being kept a secret for now, it has already been confirmed that they will both be featured heavily in the new season.

Their casting are the first additions made by new showrunners Frank Pugliese and Melissa James Gibson, who joined the series as senior writers in Season 3. They have taken the reins from show creator Beau Willimon, who exited the show just this January.

The show has shocked fans time and again with unsuspected character deaths and unlikely alliances, but Season 5 might provide the biggest shocker of them all with Frank Underwood’s (Kevin Spacey) death.

Michael Kelly, the actor who plays Underwood’s right-hand man Doug Stamper, was asked by Deadline earlier if it’s finally Underwood’s time to go. Kelly provided a cryptic answer: “You lose characters that you love. We almost lost Frank, and I always have faith in the writers that no matter what road we go down, we're going to come back to what the show is.”

Some people think it would be an interesting twist to see Stamper betray Underwood in the end by killing him, but Kelly does not see that scenario ever happening.

“Those two men trust each other to the ends of the Earth. They're the only two people that each of them could count on,” he told CNN. “You've never seen Doug turn on Frank. We've never seen Frank turn on Doug. And they trust each other to the ends of the Earth so that's where Doug belongs. That's where he is. That's where he thrives in life.”

“House of Cards” Season 5 will premiere in 2017.