He then added in an American accent: “Hey, Cameron, Prime Minister’s questions, we love your show."
Mr Cameron has previously attempted an Australian accent and an impression of William Hague's Yorkshire accent.
Mr Cameron also used his final appearance at Prime Minister's Questions to dismiss suggestions he will look to take over as Top Gear host or England manager, joking they "sound even harder" than being PM.
He also stressed his love for Larry the Downing Street cat and swapped warm wishes with Labour leader Jeremy Corbyn - despite numerous jokes at his opposite number's expense.