Interview with Richard Matheson, author of I Am Legend
Link to interview with Richard Matheson conducted for the unreleased book The Last Man on Film: Adaptations of Richard Matheson's I Am Legend below.
Richard Matheson: "Vincent Price was a wonderful actor who did marvelous performances for the films I wrote for American-International. He was mis-cast in The Last Man on Earth however. At the time, I thought maybe Jack Palance would be good. Now I would pick Harrison Ford. But that will never happen."
http://iamlegendarchive.blogspot.com/p/richard-matheson-interview.html