coup de main - noun
\ˌkü-də-ˈmaⁿ
Definition of coup de main : an attack that achieves complete surprise.

Charli XCX and Jack Antonoff to write and produce music for 'Mother Mary'.

Charli XCX and Jack Antonoff are set to write and produce original music for A24's new film, 'Mother Mary'. The film stars Anne Hathaway and Michaela Coel. 

Deadline says: "The film will be an epic pop melodrama following a fictional musician (Hathaway) and her relationship with an iconic fashion designer (Coel)."