Amanda Seyfried boards David Fincher’s next

Amanda Seyfried (“Twin Peaks”, “Mamma Mia!”) has joined the cast of David Fincher’s “Mank”.

The Netflix feature, about the development of “Citizen Kane”, features a pretty snazzy cast including Gary Oldman, Lily Collins and veteran actor Charles Dance.

The film, penned by Fincher’s late father Jack, will shoot in black-and-white next month.