Can you speak in an English Accent?

I just came across this fun photo gallery and article of American Actors, British Accents from the LA Times:

Off with their heads! The British had their knickers in a twist when it was announced that two Americans would be playing the legendary historical characters Mary and Anne Boleyn in “The Other Boleyn Girl.” The pitch-perfect results delivered by Scarlett Johansson and Natalie Portman helped ease any tensions, however. After all, British accents are de rigueur for today’s American actors. Here’s a look at several American actors attempting the King’s English:

Accents are rated with Scones! How cute and clever!