Why so many British actors in American productions?

The simple answer is that the production wants the best actor for the job, regardless of their native accent and actors want the best paychecks, so they audition (and get) jobs in Hollywood.

Also, because the American film industry is the leading film industry in the world (though others produce more films), it is appropriate for non-American talent to have a place in American film. They're native English speakers and part of learning to act is learning dialects. And even if they're not native English speakers, that doesn't make them unworthy as actors.

This happens in every dialect for every possible mix of characters, not just British.

Australians play Wolverine and Thor and The Hulk, and The Joker.

Irish play Magneto and Steve Jobs (the former is supposed to be German but played by a British actor in other versions),

But what about Americans playing quintessentially British characters... like Sherlock Holmes, Margaret Thatcher, and Lara Croft.

And, above all of that, America is a country of foreigners and, particularly in big cities, it's common to work and go to school with people who aren't native to the US.

I think the better question is: "Why shouldn't they play these roles?"

In terms of English speaking nations that are likely to have, per-capita, a larger than normal number of talented actors, Great Britain has an immense theater history that still thrives today.

Combine that with the fact that the US has a giant media industry hungry for talent, it's only natural to see a lot of British talent over here.

It's possible that you've underestimated the cultural relationship when you say in a comment "I see two different nations, in different continents, with an ocean in the middle, with different histories, customs, linguistic traditions (even without invoking Wilde), uses, laws etc."

It's not just acting: in several aspects of culture (I'd say especially literature and music as well as film/TV), the UK and the US are highly influential on one another. This also includes some other English-speaking countries such as Ireland, Australia, NZ.

So The Beatles (English), The Rolling Stones (English), U2 (Irish), AC/DC (Australian), J. K. Rowling (English/Scottish), Dylan Thomas (Welsh), Arthur Conan Doyle (Scottish), Charles Dickens (English), Jane Austen (English), Monty Python (English, Welsh and American) have all been very well-regarded in the US in their time. Still are. Coldplay (English) are doing the Super Bowl half-time show this year. The Who did it in 2010, The Stones in 2006, Paul McCartney in 2005, U2 in 2002. Sting and MIA have both appeared in recent years although they weren't headlining it. Simply, there's a mass-market audience in America for British (and Irish) stuff.

Even so I wouldn't say the US is clamouring for British culture (and actors) as such. For example, they maybe don't pick up top UK TV shows with quite the frequency they do top UK actors, and you can see that the US version of The Office has made a lot of cultural adaptations from the original. But the barriers to "breaking America" aren't all that high, provided what you're doing is something the American audiences find worthwhile.

In this context, I don't think it's at all anomalous that a lot of British actors find work in the US. It's much the same as the way that a lot of British musicians and writers find work and sales in the US (or at any rate consider it worth trying even if many are unsuccessful). As long as we don't deliberately use a difficult accent, the Americans understand us.

Brits in American movies are a less recent phenomenon, but I would say that since around the time Hugh Laurie got "House", there's pronounced trend for UK actors starring in top US TV shows. You could add "The Wire" to your list, with two British actors among an admittedly larger-than-average lead cast. Those 12 years or so it's become enough to be remarked on here in the UK, so it's not just you who thinks there's more than there used to be. When I say "what there used to be", it's possible that I mean "Star Trek: TNG, Frasier, and, um...". I can't account for that particular upswell of US appreciation of Brits on TV, but I suspect it combines "this seems to be working, let's do more of it" on the American side, with "this is a big opportunity in a much larger market than home" on our side, and "globalisation keeps getting easier" in general.

Maybe there is in addition a general trend for US TV to be less parochial than it was up to, say, the 80's and early 90's, while US movies were more international earlier on. If as an American you're going to look abroad then Britain is an obvious early place to look (large English-speaking country, strong cultural, historic and business connections). That would account for a big influx of Brits once the doors open. But perhaps that's unfair to 1980's US TV, I really don't know all that much about it.

One special case is "Game of Thrones", which for sensible reasons is filmed in Northern Ireland among other places, in a pseudo-British-history setting. Therefore it makes all sorts of sense to fill it with British actors, which contributes to the recent trend.

Since I possess one, I can say it is true that many Americans do enjoy the sound of a British accent, especially when they encounter it in their own country. And it's not just that they personally like it when they hear it, it's that "liking British accents" is recognised among Americans as a thing. Many aren't bothered one way or the other, though, so it's not a universal characteristic of the nation.

Specifically on acting, I think that to some extent the Shakespearean and performance focus of British styles might throw something different into the mix that helps some British actors find certain roles. I'm thinking of the Patrick Stewart / Ian McKellen / Judi Dench kind of thing, where sometimes it really is a case of "let's get a Brit in", and the reason is in part that US film-makers admire a particular thing that Britain does well. Obviously those three are very talented to begin with, which does them no harm at all, but it's a niche that as far as I know the US dramatic tradition isn't quite so focussed on filling as the British tradition is (or used to be). Since the US considers Shakespeare to be a vital part of the literary/dramatic canon of their language, if not their country directly, maybe a British actor is no great shock for them even in non-Shakespearean roles.

This is enough of a trend that there's a TV Trope of the "Shakespearean actor". OK, I admit, that's not a high bar for strength of trend, and some American actors fall within it too. But no doubt the recognition of that kind of acting does help get a foot in the door for many British actors on first crossing the Atlantic.

Catija's answer already suffices. However, I do want to point out that the accent can help paint a particular character.

• Someone disconnected from local (US) culture
• Someone considered raised in an exceedingly upper class environment
• Someone who has excessively refined taste (subverted or not)
• The villain to an American hero, due to the stereotype that arose from US freeing itself from the (then considered oppressive- British empire

These all adhere to a particular British stereotype (as perceived by Americans). I'm not saying the stereotype is correct, but it has become a cliché.

While none of these role particularly require a British accent, you can consider a British accent as an additional benefit. This is the same principle as hiring an actor because of their looks.

As to the references you make for British actors who hide their accent, the role generally would be negatively impacted by a British accent

Daniel Day-Lewis as Lincoln,
Anthony Hopkins as Nixon,

American historical figures

Hugh Laurie as Dr House,

If he had used his British accent, House/Laurie would've been dismissed by viewers as a British twit (not unlike Laurie's characters in Blackadder). The character would be interpreted very differently, less heavy on the drama and more comical.

Christian Bale as Bruce Wayne,
Henry Cavill as Superman,
Charlie Cox as Matt Murdock/Daredevil,
Benedict Cumberbatch as Doctor Strange

They are all American super heroes, and with the exception of Dr Strange, their backstory specifically entails being raised locally, thus implicitly requiring their accent to be localized.

The ACTUAL reason why there are so many British actors in Hollywood movies is because of the financial credit that UK government provides.

Now, try to remember a British actor in an American movie. There is a 90% chance that movie is a blockbuster or what I mean by a blockbuster is high budget/production movie.

In order to improve and attract the local movie productions/studios, UK government offers a financial credit to the studios. And studios being studios take as much as advantage from this incentive. And in order for a movie or production house to qualify for this incentive credit from UK government the movie should check couple of boxes:

1. Major part of the production should be shot in UK
2. Certain % of leads/actors should be British
3. The production should be of certain budget

And a few more which I don't remember.

So as the Incentives are a good eye candy for the studios, they do there best to take the gist of it.

The reason why most high production movies have lot more British actors is they qualify for the 3rd point above and they have necessary budget to shift there American crew to UK and start the production. You can see any low or medium production movie probably less than $100 mill and mostly they have only American actors cause they may not qualify for the 3rd point above and even if they do it is not feasible to move the US team to UK as it eats the budget.

The best example I can give you is of Blumhouse production movies which is based in US and they make low to medium budget horror movies and look at the cast and mostly it is 100% American. And why don't the Blumhouse movies have British actors? cause it is not really feasible to them to move the production outside and also they won't qualify with there low budget for the incentive.

And it's not just the UK, many countries also provides these incentives. Norway, New Zealand, Australia and Canada. You'd be suprized on how many hollywood movies get shot in New Zealand.

The reason for these governments to offers these incentives is coz movie jobs are highly paid and by having the production in there country it will employee thousands, improve technology and kinda free tourism marketing for the country.

So by giving these incentives to the studios, indirectly this will employ thousands and return huge in tax for the government. So it's a win-win for studios and the Country.

Sources: Highly recommend to watch this

Film tax relief