Robert Duvall was featured in numerous films .
Duvall began appearing in theatre during the late 1950s , moving into television and film roles during the early 1960s , playing Boo Radley in To Kill a Mockingbird -LRB- 1962 -RRB- and appearing in Captain Newman , M.D . -LRB- 1963 -RRB- .
Robert Duvall