The man portrayed as Willard's father in the painting and family pictures is Bruce Davidson, the man who played Willard in the original 1971 film.

When Willard's boss is working on his spreadsheet program, just before the rats show up, he is not entering the spreadsheet formula properly. He is entering the actual numbers like 235+345+315 instead of using cell addresses like =A1+B1+C1. Not really a mistake because his character could be an idiot on spreadsheets. Just an interesting observation.

The song "Ben" at the end of the movie is being sung by the movie's star, Crispin Glover.