u/RosyRascalRider

As in the title, earlier this year my family had gotten into an argument against me as to whether the song Ben was written for the 1971 movie Willard or the spin-off movie Ben (1972).

I'm in the camp that it was written for Ben, but everyone else is saying it was for Willard. My opinion isn't respected because I lack primary sources (in their words, "you can't trust Google because they lived through that era"), and I'm having trouble finding primary sources that explicitly SAY which movie it's written for. I feel like I'm going insane, here, being the one holdout and starting to think I may be wrong. I really just want to know, with as much ironclad evidence as possible (preferably primary sourced), which movie that song was written for?