Clooney shared the advice when the pair worked on "Leatherheads" in 2008, reported Contactmusic.
"George taught me the importance of a good script. He said that, as a director, you can always make a bad movie out of a good script, but you can never make good movie out of a band script.
''I agree with him and I've seen both those things happen many times. You have to be willing to devote a few years of your life to getting the script done. George said that you need to believe that you have your own specific take on a project and that you can bring something to directing the film that no one else can," Krasinski said.
The actor's directorial debut "A Quiet Place", which he also stars in alongside his real-life wife Emily Blunt was well received by both audiences and the critics.
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