1. - Dennis Hopper, Giant, 1955.

2. - Don Dubbins, Tribute To A Bad Man, 1956. After just four films (The Caine   Mutiny, The Long Gary Line, etc), Francis was killed at age 25, crashing his private plane during the two month break in shooting while director Robert Wise searched for a replacement for an obstreperous Spencer Tracy. Now Wise needed a second substitute.