How Every Avengers Actor Was Cast In The MCU

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While the studio is far from infallible, it is safe to say that Marvel Studios' casting decisions rarely miss the mark in the MCU - and every Avengers actor has a compelling story behind how they were cast. Since it began in 2008 with Iron Man, the MCU is now the biggest franchise in cinematic history, becoming a powerhouse that would inspire the modern phenomenon of cinematic universes. The actors that make up its central characters are largely to thank for its success, and it is now hard to imagine any other actor portraying the current lineup of Avengers.
Ollie Bradley

https://screenrant.com/mcu-every-avengers-actor-casting-explained/