Michael Byrne is an English actor who portrays Gellert Grindelwald in Harry Potter and the Deathly Hallows: Part 1.

Byrne's other film credits include Indiana Jones and the Last Crusade (with Julian Glover) and The Saint (as Rade Serbedzija's aide-de-camp). His television roles include Peter Guillam in Smiley's People and Major Nairn in several episodes of the miniseries Sharpe.

He portrayed Alfred Maxwell on Casualty in 2015 in a recurring capacity.

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