For Righteous Kill, David Letterman invites the two acting legends, Robert De Niro and Al Pacino, to justify the top 10 reasons for being an actor. Don't be fooled by both of these actors' knack for dramas, these two have some hilarious reasons for acting, such as free pudding and proving to people that they're still alive.

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DeNiro and Pacino: Letterman Top 10 List
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