Steve Rogers' hair varies throughout the Marvel Cinematic Universe films. In Captain America: The First Avenger and The Avengers, it seems very blonde and wavy. In later films like The Winter Soldier, his hair seems spikier and more of a dirty blonde. My question is: in what MCU films is Chris Evans wearing a wig and in what films is it just his hair styled differently?
As far as I can tell, the only times Evans wore a hairpiece while filming the MCU films were during the shawarma scene at the end of the first Avengers movie, since it was filmed later and he'd already had to change his hairstyle for filming Snowpiercer (they also had to use prosthetics to hide his facial hair, which is why Cap isn't eating), and when filming his last scenes in Endgame where he wore it over a bald cap as discussed (and shown) here and here.
He doesn’t wear a wig at all for the majority of the films, it’s all his own hair albeit dyed at times, certainly so in the earlier films, because he has quite dark hair. You can see this from some of the real life photos of the actor, for example, the premieres for Captain America: The First Avenger, Captain America: The Winter Soldier and Avengers: Endgame.
The only times he seems to wear a wig are in the shawarma scene in The Avengers because he’d cut his hair and grown a beard for Snowpiercer which also meant he had to wear a prosthetic.
He also wears a bald cap in the final scenes of Avengers: Endgame. Of course this is for
Lastly, whilst you can’t really find evidence that actors use their real hair in the majority of cases, for obvious reasons, I have found an interview of him talking about growing his beard. Or several to be honest after it went viral.
“Well that’s good. That’s good, because I like it too,” said the 36-year-old star. “I mean, I usually live my life with a beard. I’m not a huge fan of shaving, and it just provides a little bit of anonymity at times… I was really excited that the Russo’s and Marvel were willing to kinda give that look a shot.”