[Human]: Do you know who starred in Fight Club? [Assistant]: Fight Club stars Jared Leto,  the musician Meatloaf and Helena Bonham Carter. [Human]: Wasn't Zach Grenier from Zodiac in it, too?  I think he was also in Donnie Brasco. 
No, Zach Grenier wasn't in Fight Club. However, he did appear in the movie 12 Monkeys alongside Brad Pitt and Morgan Freeman.