LONDON, ENGLAND - NOVEMBER 30:  Jim Broadbent attends the UK Premiere of "Get Santa" at Vue West End on November 30, 2014 in
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Jim Broadbent, a real-life Oscar winner and Harry Potter alum, is joining the cast of Game of Thrones for a top-secret role in Season 7.

According to Variety, HBO has confirmed that Broadbent’s role will be “significant,” but will not offer any other details. Since the TV show has moved past the George R.R. Martin books, diehard fans are left wondering who, exactly, Broadbent will play, much like they did last season with Ian McShane’s one-episode appearance.

Broadbent won a Best Supporting Actor Oscar for 2001's Iris, and is best known for his roles in Moulin Rouge!, Another Year and The Iron Lady. The 67-year-old Brit will appear in Bridget Jones’s Baby next month.

Season 7 of Game of Thrones will be shorter than its previous runs, with seven episodes airing next year instead of 10. The eighth season will be its last.

Listen to a Game of Thrones Season 6 finale recap on Back of the Class: