Daniel Day-Lewis has reignited Hollywood's fiercest acting debate – method or madness – after clashing with Brian Cox over what the veteran actor called the "lunacy" of method acting.

But RadarOnline.com can reveal that for Day-Lewis, 68, it's not insanity but devotion – while for Cox, it represents self-indulgence. Article continues below advertisement

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Three-time Oscar winner Day-Lewis, who is returning to screens this year in his son's movie Anemone , defended his lifelong commitment to the craft in The Big Issue , insisting critics "don't understand" what method acting truly means.

He said: "I just don't lik

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