Cameo appearances in films are usually discovered pretty quickly, especially in these days of freeze-frame DVDs, but this one took more than sixty years for people to notice.
Although some people (surely?) must have spotted it before, it was only in 2009 that word really spread about Raymond Chandler’s appearance in Double Indemnity. It first cropped up on Mark Coggins’s blog, before being covered in the Guardian.
As cameos go, it’s a good one. Chandler looks up at Fred MacMurray’s character as he walks past, much as you would imagine one of the film’s writers might want to keep an eye on his characters. (Chandler co-wrote the screenplay with director Billy Wilder, adapting it from a book by James M Cain.)