
Pictured is Katori Hall, a Memphis native, whose play set in the Lorraine Motel imagined the last night of Dr. Martin Luther King's life. Her work, The Mountaintop won an Olivier for "Best New Play" and she's quoted in London's Times as saying, the production would likely be controversial in the United States because it depicts Dr. King as an imperfect man, who accomplished great things.
Otherwise, though I know nothing about the play except that it'll be previewing on Broadway in two weeks, but Rupert Goold won "Best Director" for Enron, which I assume is about an American subject. Debbie Allen's Cat on a Hot Tin Roof won "Best Revival"; Rachel Weisz and Ruth Wilson were named "Best Actress" and "Best Supporting Actress", respectively, for their turn in A Streetcar Named Desire.
Unfortunately, I'm not familiar enough with the rest of the plays to determine all of their nationalities, but there was definitely an American presence and perhaps as proven by this post, a lot can be said for accompanying an article with a good picture.