Twilight's Edward Cullen was his toughest role ever, says Robert Pattinson

Robert Pattinson has stated that his Twilight Saga character of Edward Cullen has been the toughest he has played till now. The 28 year old actor reached the spotlight with Twilight series films. Recently, in an interview with a leading British newspaper, he told that he believes that Twilight is probably the hardest part he has done because to do it for 5 films. It is really hard to think of stuff that's maybe not boring.