'House of Cards' adds Patricia Clarkson, Campbell Scott (Exclusive)

Netflix's House of Cards is adding two big names for season five.

Oscar nominee Patricia Clarkson and Campbell Scott have booked major roles in the Kevin Spacey drama's upcoming season, The Hollywood Reporter has learned.

Details of their roles are being kept under wraps, though both will be featured heavily in the new season.

Read more: 'House of Cards' Season 5 Predictions: Where the Netflix Drama Can Go From Here

For Clarkson, who scored an Academy Award nomination for Pieces of April, the role marks her biggest TV role to date since 1996's Murder One. She previously won a pair of Emmys for her guest role in HBO's Six Feet Under. Her credits include Shutter Island, The Green Mile and Friends With Benefits. Clarkson is repped by CAA and Anonymous Content.

See photos of "House of Cards" star, Kevin Spacey:

Scott, meanwhile, will make his TV return following multiple seasons of USA Network's Royal Pains and a guest arc on FX's Sex&Drugs&Rock&Roll. On the film side, his credits include The Amazing Spider-Man 2 and The Exorcism of Emily Rose. He's with Paradigm.

Read more: 'House of Cards' Taps New Showrunners

For House of Cards, the castings mark the first additions to the series for new showrunners Frank Pugliese and Melissa James Gibson, who first joined the drama as senior writers in season three. They take over the showrunning duties from creator Beau Willimon, who in January exited the series when it was renewed for a fifth season.

Read more: 'House of Cards' Renewed for Fifth Season, Showrunner Beau Willimon Exits