This reminds me of Guy Pearce in Prometheus. Ridley Scott got a 44 year old to play a 90 year old dude, required over 5 hours of makeup, and he doesn't even appear as his younger self in the final film release. Why didn't he just get a 90 year old to play that part?
Ridley Scott initially wanted Max von Sydow for the role of Peter Weyland. However, Scott and Damon Lindelof conceived of a scene in which David the android (Michael Fassbender) would interface with Weyland while in hypersleep, and that Weyland's dream would reflect his looks as a younger man since he is obsessed with immortality. Though the scene was cut from the script and never filmed, Guy Pearce had already been cast in the role and thus underwent extensive make-up to appear elderly. Fortunately, Pearce was also allowed to appear as the younger Peter Weyland giving a TED Talk in one of the promotional clips of the movie. A longer version of this clip is available as a bonus feature on the home theater edition.