New Delhi, Feb 24 (ANI): Leonardo Dicaprio has revealed that he had to convince Daniel Day-Lewis to act in 'Gangs of New York'. The 'Inception' star said that he had to convince Daniel Day-Lewis to come out of retirement for the film because director Martin Scorsese was sure that he would perfectly fit for the role of Bill- 'the Butcher' in the film. Dicaprio revealed that he had spent weeks trying to persuade one of his idols to take the role of a vicious thug. Dicaprio further added that he slightly disagreed with him at first, but eventually said yes.