During that time, Downey and the brothers showed plenty of support for each other in different ways, whether it was the Russos praising Downey as Iron Man or the actor trying to enforce the directors’ no-spoiler policies.
Robert Downey Jr. and the Russos worked together for a number of years, with their working relationship beginning in earnest when Downey signed on to play Tony Stark in Captain America: Civil War.
From there, they would also collaborate on the massive Avengers: Infinity War and Endgame.
You love to see this kind of bond between an actor and director(s).