20 Things You Didn't Know About Layer Cake
3. Sony Wanted A Happier Ending
Sony lobbied hard for the movie to end in a decidedly happier fashion than it ultimately did, pitching that XXXX and Tammy (Sienna Miller) would ride off into the sunset in a typical happy ending.
But Vaughn reportedly filmed the final ending without telling the studio, where XXXX is shot by Sidney and the credits roll with his fate left ambiguous.
Vaughn then decided to show this ending to a test screening audience, and due to the positive reception - surprising for a test audience, honestly - he was able to stick to the bleaker finale he envisioned.
In Vaughn's own words, "It was not like other American movie endings."