Warning: Possible Marvel Universe spoilers ahead.

It's tough now to imagine any other actor in the role of Tony Stark, aka Iron Man, in the Marvel Cinematic Universe.

But in a Reddit Ask Me Anything question-and-answer session online Wednesday night, Marvel Studios president Kevin Feige said he had to fight hard for the casting.

Feige actually answered that question twice.

First, Reddit user JokerFaces2 asked Feige, what his hardest sell to executives was, the one thing "that you fought for most, that others tried to shut down?"

And the second time, Reddit user WhoDey42 just flat-out asked, "What casting did you have to fight the hardest for?"

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