During this time, Harvey Keitel auditioned for filmmaker Martin Scorsese and gained a starring role as "J.R.", in Scorsese's first feature film, Who's That Knocking at My Door (1967). Since then, Scorsese and Keitel have worked together on several projects. Keitel had the starring role in Scorsese's Mean Streets (1973), which also proved to be Robert De Niro's breakthrough film. Keitel re-teamed with Scorsese for Alice Doesn't Live Here Anymore (1974), in which he had a villainous supporting role, and appeared with Robert De Niro again in Scorsese's Taxi Driver (1976), playing the role of Jodie Foster's pimp.