Top Definition
An irish actress who can't pronounce her name right, or run. Makes every scene she acts in gay af. Have 3+ birthdays, probably a fucking vampire.
Girl 1 : When is Katie McGrath's birthday?

Girl 2 : Who the hell knows? Not even wiki knows.
by superxflash January 29, 2017

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An Irish celebrity best known for her role as Morgana Le Fay in the BBC version of MERLIN.
How beautiful did Katie Mcgrath look in last nights episode?
by Smithielockdown March 08, 2011

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