Robert Downey Jr.’s other famous line in Avengers: Endgame was surprisingly not brought to the table by himself, the Russo Brothers, or Christopher Markus and Stephen McFeely.
The line has quickly become an MCU fan-favorite, but it wasn’t written by Christopher Markus and Stephen McFeely.
The touching line is brought up again at the end of Avengers: Endgame, solidifying its place in the history books.
Thankfully, the Russo Brothers and Christopher Markus and Stephen McFeely have been shedding some light on the secrets.