VIDEO : Tom Cruise Teaches Jon Stewart How to Get Into Action-Star Shape

If Jon Stewart wants to look like Tom Cruise, he may have his work cut out for him.
The Mission: Impossible ? Rogue Nation star appeared on Tuesday's Daily Show, where host Stewart asked how long it would take for him to look as good as Cruise does in the film without a shirt.
Stewart claimed, "I don't take off my shirt even to shower." He then asked if his diet should be altered, to which Cruise answered, "You've got to look at your diet, yes ? that would be a good start."