 When Blair left office in 2007 , it was reported that his successor as Prime Minister , Gordon Brown , was also being lined up to guest star on the show . Animator Dan Povenmire noted that American audiences would probably require subtitles to understand what Brown was saying . Voice actress Yeardley Smith noted that she would like Brown to appear in The Simpsons , but Brown ruled a guest role out stating : " I think Tony Blair did that , I don 't think that is for me " . Series creator Matt Groening confirmed that Brown would not be approached for a part . 
