Whenever celebrities are asked to do a cameo on The Simpsons it is seen as an honor. Yet not all celebrities want to be a part of the cartoon that many love to watch. Showrunner Al Jean wanted to get some more Australian stars on the show… But he unfortunately got denied by three big Aussie stars. They Chris Hemsworth and Liam Hemsworth but they both said no. Then they asked Hugh Jackman and he also said no.