Vince Vaughn and Owen Wilson "push each other" to be as funny as possible.
'The Internship' stars - who previously starred together in smash hit comedy 'Wedding Crashers' - were left "exhausted" after filming their 2005 caper because they kept trying to outdo one another for laughs.
Wilson said: "It was nice to be reunited and to work with a friend. We were exhausted when we finished 'Wedding Crashers' because we always push each other to try and make the scenes as funny as possible. You have some laughs and are inspired to do good stuff."
In the new comedy caper, the actors play interns at internet search engine Google, and although Wilson's character, Nick Campbell, is technology savvy, he admits he is not "super-computer literate" in real life.
He told the Metro newspaper: "I am not super computer-literate. I still use a BlackBerry, and people act like that makes you a dinosaur but I remember when a BlackBerry was cutting-edge technology.
"Time marches on, doesn't it? I'd like to become more tech-savvy, though. I want to be relevant."
Despite many of his movies - including 'Meet the Parents' and 'Cars' - being worldwide hits, the actor remains modest about his success.
Quizzed whether 'The Internship' is about second chances, he added: "I think the question is really about a second career. Not many people get to do one thing and then start something a little bit later in life and are successful or fulfilled by it.
"I managed to do OK at acting. I have been pretty lucky. I have fun doing what I do."
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