United Kingdom, Oct. 15 -- Daniel Day-Lewis "didn't have a clue what [he] was doing" with his first Oscar-winning movie role.

The 68-year-old star is known for his method acting technique of absorbing himself in his characters but when he tried it for the first time playing Christy Brown in 1989's My Left Foot, he was "clueless" about his approach.

Speaking at the BFI London Film festival, he admitted: "I was clueless. I didn't have a f****** clue what I was doing."

As filming went on, Daniel began to take "very gentle steps" towards using method techniques.

He said: "I thought of the wheelchair as a cage . and I began to work a lot with my foot."

The Anemone star insisted his approach "makes sense" to him but other actors can still ...