I would hardly call British actors "dominant" in Hollywood. They are prevalent, sure. But even in your example -- the only actor from [i]Game of Thrones[/i] to even be nominated for a Golden Globe or Emmy (and he won both) was one of the few American actors on the show (Peter Dinklage). The Forbes list of Hollywood's highest paid actors includes [url=http://www.forbes.com/sites/dorothypomerantz/2013/07/16/robert-downey-jr-tops-forbes-list-of-hollywoods-highest-paid-actors/]zero Brits[/url], and their list of most [url=http://www.forbes.com/celebrities/#page:1_sort:0_direction:asc_search:_filter:All%20categories]powerful celebrities[/url] has no British actors or actresses in the top 50. AMC's list of the [url=http://movies.amctv.com/movie-guide/the-50-greatest-actors-of-all-time/]greatest actors of all time[/url] has no Brits in the top 10, and only 2 actresses on their list of the [url=http://movies.amctv.com/movie-guide/the-50-greatest-actresses-of-all-time/]greatest actresses of all time[/url] are British. There is no doubt that there are tons of great British actors in Hollywood, and some of them are among the greatest actors ever. There are a bunch of British actors/actresses that I personally count among my favorites. But I would tend to disagree that they are somehow "dominating" Hollywood; that simply doesn't seem true by any measure except a Super Bowl commercial.