Was the phrase Here's looking at you first coined in the film Casablanca?

Yes, the phrase "Here's looking at you, kid" was popularized in the film Casablanca, released in 1942. It was famously delivered by Humphrey Bogart's character, Rick Blaine, to Ingrid Bergman's character, Ilsa Lund. While the phrase may have been used in earlier contexts, its iconic status and association with the film cemented its place in popular culture.