Avengers: Endgame - 33 Easter Eggs & References Explained

5. Harley Keener

During Tony's funeral, the Russos memorably pan past every major surviving MCU character in an incredible single take, cementing the enormity of this roster of heroes, but there's one blink-and-you'll-miss-it appearance that left some fans puzzled.

A teenage boy is visible among the group, and that boy is none other than Harley Keener (Ty Simpkins), who of course teamed up with Tony Stark back in Iron Man 3.

Simpkins' appearance has obviously changed substantially in the six years between movies, so there's no shame in missing it, but it's a great nod to one of the more memorable one-off characters from Stark's past.