The film clinched a special award from the Cinema for Peace on Thursday.
Cinema for Peace honours the most valuable films of the year focused on human and social rights, the fight for justice and environmental sustainability.
Singh says he's honoured.“This is all about him and his legacy and we feel the film is telling his story.”
He adds that Madiba epitomises the journey to a peaceful transition in South Africa.
The awards ceremony will be held in Germany on 10 February.
The movie is an adaptation of Nelson Mandela’s autobiography Long Walk to Freedom and was fully financed and shot in South Africa.The R350 million project chronicles Mandela’s life from his childhood through to his inauguration as South Africa’s first democratically elected president.
The all-star local and international cast includes Naomie Harris, Idris Elba, Terry Pheto, Riaad Moosa, Lindiwe Matshikiza, Fana Mokoena, Tony Kgoroge and Deon Lotz.
The global icon died peacefully at his Houghton home in northern Johannesburg on 5 December 2013 at the age of 95.
He was buried in the rural village of Qunu in the Eastern Cape on 15 December at a funeral service attended by 4,000 people.