If you've ever tried to do an accent and it's backfired, then you'll know how Prime Minister David Cameron's feeling!
He had a go at copying Australian PM Julia Gillard's accent during a speech, but it's left many journalists in Oz unimpressed.
A news website called it "perhaps one of the worst Aussie accents in history" and so bad it could cause a row between countries!
One newspaper thought it was "bizarre".
Mr Cameron was speaking about a Commonwealth leaders' meeting in October, where they voted to change a royal succession rule so that boys were no longer favoured over girls.
He told the audience at the Lord Mayor's banquet on Monday: "I can't quite do the accent but I'll try - 'Not a bit David, this is good news for Sheilas everywhere.'"