'Game of Thrones' Adds Richard E. Grant for Season 6

Richard E Grant - H 2015

HBO's Game of Thrones continues to add to its season six cast.

The fantasy drama has enlisted Richard E. Grant, The Hollywood Reporter has confirmed.

Details on just whom the Girls, Downton Abbey and Doctor Who alum will play are being kept under wraps.

Grant joins a season six cast that includes new additions Freddie Stroma (UnREAL), Pilou Asbæk, Max von Sydow and Ian McShane.

Game of Thrones returns in the spring.