"Taxi Driver" Oscar nominee (2,4)

I believe the answer is:
de niro
(Other definitions for de niro that I've seen before include "Robert -, Oscar-winning US actor" , "Robert . . . . . ., film star of ''Taxi Driver'' and ''Raging Bull''" , "American actor, b. 1943" , "Actor who plays mainly tough characters" , "Starred in The Godfather and Raging Bull" .)