5 Iconic Movie Lines That Were Never Actually In The Script

Jack Nicholson's "Here's Johnny!" wasn't in The Shining's script

Nicholson ad-libbed the line while breaking through the bathroom door, referencing Ed McMahon's famous introduction of Johnny Carson on The Tonight Show. It instantly became one of the most quoted lines in horror history.

Humphrey Bogart's Casablanca farewell was improvised because the script wasn't finished

Casablanca was famously being rewritten during production, and Bogart ad-libbed part of his farewell scene because a finished version of the dialogue simply didn't exist yet when the cameras rolled.

"Leave the gun, take the cannoli" started as just "leave the gun"

The Godfather's script originally just called for Clemenza to say "leave the gun." Actor Richard Castellano added "take the cannoli" on set, reportedly at the suggestion of his real-life wife, turning a throwaway logistical line into one of the film's most quoted moments.

Robert Downey Jr. improvised "I am Iron Man" — and it reshaped the entire MCU

The closing line of 2008's Iron Man — Tony Stark publicly outing himself as the hero rather than sticking to the expected secret-identity trope — was improvised by Downey Jr. on set, setting the tone for the shared-universe approach the rest of the MCU would follow.

Robert De Niro's entire mirror monologue in Taxi Driver was improvised

Travis Bickle's famous "you talkin' to me?" mirror scene was not fully scripted — De Niro improvised the entire exchange with himself, and it went on to become one of the most referenced moments in film history.