Martin Compston joked it took him '10 year to grow a beard' in Line of Duty as fans can't get over his character's 'glow up'.
The hugely successful BBC cop drama came to an end last week, with 12.8milion people tuning in to watch season six finale's controversial ending to the long-running "H" storyline.
The Scots actor, 36, has starred as DI Steve Arnott since Line of Duty's inception in 2012 - and viewers can't get over how different his character looks in throwback photos.
BBC iPlayer's official Instagram account posted a series of photos from each of the six seasons, with Martin's character going from baby faced to a full beard.The Greenock-born actor reposted the photos to his Instagram stories, writing: "Ten year to grow a beard".Line.
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