tldr; the famous art from the Jaws movie poster was originally a book cover. When first published it lacked the required attribution of the time to get enforceable copyright.
IIRC, there are some films in public domain for having "failed" to do this as well.
kQq9oHeAz6wLLS
The biggest is probably "Charade" with Cary Grant, Audrey Hepburn and Walter Matthau.
duskwuff
Funny - the first one that comes to mind for me is "Night of the Living Dead" (1968).
IIRC, there are some films in public domain for having "failed" to do this as well.