Greatest Opening to an Elvis film was...

ROUSTABOUT - Always loved that film but I don't know why

I'm not much of a fan of the 1960s "travelogues" (as Elvis referred to them) so....I'm going to go for the two final documentaries, "Elvis: TWWII" (Original & SE) & "Elvis On Tour" (Original film - not the DVD).

im adding roustbout to