With the new 'Mission Impossible' film recently hitting cinemas in the US, Tom Cruise is on the promo trail - but not all of his talk show appearances will be as fun as his one with Jimmy Fallon.

Cruise took part in a 'Mission Impossible'-themed 'Mad Lib Theatre' sketch - giving Fallon a list of random words that are then inserted into a sketch that they both took part in - and as good an actor as he may be, he couldn't quite keep it together.

In fairness, it's not every day you hear Tom Cruise saying 'Poop-diddy-scoop' with a straight face.

Watch it below: