Oscar nominee Graham Greene has died after a lengthy illness, his representative told CBS News. The Canadian First Nations actor was 73 years old.

"He was a great man of morals ethics characters and will be eternally missed," Greene's talent agent said in a statement.

The statement did not specify what kind of illness Greene had.

Greene was born in Ohsweken, Canada, in 1952. His acting career started on the stage in the 1970s. He made his television debut in 1979. His first film was "Running Brave," a 1983 biopic about Billy Mills, a member of South Dakota's Oglala Sioux tribe who went on to win a gold medal in a shocking upset at the 1964 Tokyo Olympics.

Greene starred as Kicking Bird in Kevin Costner's " Dances With Wolves " in 1990. He was nominated for an Oscar for best support

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