The drink was popularized in the novel Casino Royale (1953) when ordered by its inventor, secret agent James Bond (Agent 007), to commemorate his strong feelings for its namesake, Vesper Lynd. Although there have been a teleplay and two films based on this book, the signature cocktail was only mentioned twice in the recent Casino Royale (2006 Film): when he ordered it at the poker table and several others followed suit, and when Bond states that he named the drink the Vesper, because once he tasted it, it was all he wanted to drink. The cocktail is also mentioned by its ingredients in Quantum of Solace, but Bond does not refer to it by name.
Because these movies were set in the present-day but Kina Lillet has not been available since the early 1980s, its mention in the recipe in these movies is anachronistic.
Vesper Martini From Casino Royale (2006 Film)
James Bond: I think I'll call it a Vesper.
Vesper Lynd: Because of the bitter aftertaste?
James Bond: No, because once you've tasted it, that's all you want to drink.