je le lui dirai
I'll let him know he's a coward!
Je lui ferai savoir que c’est un lâche !
— Divorce Italian Style (1961)
I'll let him know to meet us at the bank.
Je lui dirai de nous retrouver à la banque.
— The Rip (2026)
When he wakes up, I'll let him know you came by.
Quand il se réveillera, je lui dirai que tu es passé.
— Once Upon a Time... in Hollywood (2019)
Je le lui ferai savoir.