Irish actor Aidan Gillen has joined the cast of Bohemian Rhapsody, the Queen biopic starring Mr Robot actor Rami Malek as late frontman Freddie Mercury.

Game of Thrones star Gillen's casting was announced alongside that of British The Night Manager actor Tom Hollander via Queen's official Twitter account.

Movie Exclusive: Aidan Gillen & Tom Hollander Join Bohemian Rhapsody Cast To find out who they playing head over to https://t.co/Ojp2sqftpq pic.twitter.com/EU0ydqMIZc — Queen (@QueenWillRock) September 26, 2017

The film is a chronicle of the years leading up to Queen's legendary appearance at Live Aid in 1985. Both Gillen and Hollander will play Queen managers. Gillen will portray John Reid, Queen's manager from 1975 to 1978, while Hollander will play Jim Beach, Queen's longtime manager, who took over in 1978.

☆ Rami Malek Looks Just Like Freddie Mercury in First Photo From Queen Movie… https://t.co/9lYKH4JVZs #queen https://t.co/XCY3AY0fkJ pic.twitter.com/0bAwxosOjj — QUEEN NewsFlash (@wwry_jp) September 23, 2017

The cast also features Joe Mazzello, Ben Hardy and Gwilym Lee as Queen band members John Deacon, Roger Taylor and Brian May respectively, while Sing Street star Lucy Boynton is playing Freddie Mercury's lifelong companion, Mary Austin.

Meanwhile, Northern Irish actor Aaron McCusker, best known for playing Jamie Maguire in Channel 4's Shameless, will play Mercury's lover, Jim Hutton.

BOHEMIAN RHAPSODY Adds Northern Irish Actor Aaron McCusker https://t.co/GAsz9Ajycf pic.twitter.com/V1OtNf4Oeo — Movies.ie Film Site (@movies_ie) September 26, 2017

X-Men's Bryan Singer is directing from a script penned by Justin Haythe (The Lone Ranger, Revolutionary Road).

Production is already underway on Bohemian Rhapsody, which is scheduled to be released on December 25, 2018.