These unscripted Marvel movie moments are a big reasons fans continue to fawn over the MCU. For this list, well be looking at scenes that included lines or moments from Marvel Cinematic Universe movies that werent part of the original script. Our countdown includes Iron Man, Black Widow, Avengers: Infinity War, Thor: Ragnarok, Captain America: The First Avenger, and more! Whats your favorite improvised scene from MCU films? Let us know in the comments.

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