“Here’s Lookin’ at You, Kid” (Casablanca)

In the ’40s, show business was a bit different. While filming the classic movie Casablanca, the screenwriters were also still working on the actors’ lines. Much of the script was written in a hurry, which is almost unbelievable considering the quality of the dialogue.

While there were certain downsides to this, one of the pluses was that the actors were given freedom and were allowed to ad-lib whenever they felt necessary. That was exactly what Humphrey Bogart did when he delivered the classic line “here’s lookin’ at you, kid,” which Premiere magazine regarded as the greatest-ever movie line in 2007.