Who played Benoit Blanc in 'Knives Out'?

Who played Derek Zoolander in 'Zoolander'? Who played Lady Bird McPherson in 'Lady Bird'? Who played Jo March in 'Little Women'? In which film is Jo March a character? In which film is Benoit Blanc a character? Who voiced Princess Fiona in 'Shrek'? Who voiced Lord Farquaad in 'Shrek'? Who voiced Dory in 'Finding Nemo'?