While improvisation doesn’t always work in a film’s favor, these are some remarkable times it did.

15"Hey, I’m walkin' here!"

“after almost being run over by a cab.

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Image via Warner Bros.

This has easily become one of the most quotable lines in the movie and cinema in general.

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14"I know.”

Featuring loads of unforgettable moments, the 1990 movie has managed to capture many hearts.

Dustin Hoffman arguing with someone in the middle of the road in Midnight Cowboy

Image via United Artists

12"I’m king of the world!"

Guaranteed to provide the viewer with an amusing time,The 40-Year-OldVirginfeatures countless comical moments.

10You’re gonna need a bigger boat."

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With a huge impact on pop culture, theSteven Spielbergfilm stands the test of time as an essential must-watch.

9"You cant handle the truth."

In the film he attempts to prove they were only following their base commander’s orders.

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Evidently, the movie really benefited from the star’s ad-lib, which resulted in an iconic moment.

8"Leave the gun, take the cannoli."

Francis Ford Coppola’s astounding direction and memorable characters are certainly a part of what makesThe Godfatherso iconic.

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7"Here’s looking at you, kid."

Who would have thought it would instantly become one of the most beloved lines in film history?

6"Funny how?"

Han Solo looking intently ahead in a darkly-lit room in The Empire Strikes Back

Image via Lucasfilm

Eventually, what starts as a casual compliment escalates as Tommy asks: “Funny how?

Like I’m a clown?

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Richard Gere holds out a necklace in a jewelry box to Julia Roberts in a red dress in Pretty Woman.

Image via Buena Vista Pictures

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Leonardo DiCaprio as Jack holding his hands in the air and yelling with joy on the bow of the ship in Titanic.

Image via 20th Century Fox

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Paul Rudd and Seth Rogen laugh and wince as Steve Carell gets chest hair removed in The 40-Year-Old Virgin.

Image via Universal Pictures

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Roy Scheider looks over his shoulder with a cigarette in his mouth near water in Jaws.

Image via Universal Pictures

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Colonel Nathan R. Jessup on the stand in A Few Good Men

Image via Columbia Pictures

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Richard S Castellano and another man stand outside a car where a man has been shot in The Godfather.

Image via Paramount Pictures

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Humphrey Bogart and Ingrid Bergman in ‘Casablanca’

Image via Warner Bros.

Tommy DeVito talking to Henry Hill at a bar in Goodfellas

Image via Warner Bros. Pictures

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Titanic

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