Think you know the Marvel Universe? Well, your trivia knowledge probably can't match that of this four-year-old girl.
From the God of Thunder's common name to the substance that makes Captain America's shield, to Iron Man's girlfriend's identity and more, young Mia Grace has pretty much got it all figured out.
"She's a superhero junkie all on her own as much as I'd like to take credit," writes her father, who posted the video on Reddit.
Check it out for yourself, above; then let us know what you think in the comments.