However, I think these airplanes are indeed designed foremost for function. The similar appearances of the B-1 and Tu-160 suggest that when two planes are designed using similar technology with similar mission requirements, they tend to have a lot of similarities. (In the years since they were initially designed, the way these aircraft are used has changed. But they were initially designed to meet similar requirements.)
Rounded to the closest whole decade, -1; the first movie to use actual, not CGI/model/etc., F-35s on film was Man of Steel (2013).
Real F-35Bs don't have an internal gun, and if they did, the guns wouldn't fire from the intakes, and if the aircraft took a large chunk of concrete directly into the LiftFan it wouldn't shudder and slowly fall out of the sky, it would be a catastrophic and near instantaneous loss of aircraft and likely aircrew life.
I think it's a bad job of converting from a AV-8, which does have internal guns, located under each intake.
Models (both miniature and full size) were used.
https://www.latimes.com/archives/la-xpm-2011-aug-21-la-ca-mi...
https://nationalinterest.org/blog/buzz/why-f-35-stealth-figh...