Comment by rcyeh
18 hours ago
Can confirm. US passport photos want a neutral expression and explicitly say (not in the below page, but elsewhere during the renewal process) not to smile.
https://travel.state.gov/content/travel/en/passports/how-app...
Strange, one of the example photos has a person smiling. I’ve seen several US passports recently with the person smiling. It must not be an important rule if it’s not clearly communicated or enforced. Especially since some (all?) US states allow smiling in ID photos I would think they would be more explicit about not smiling in passport photos.