Some of these Easter eggs have been pretty detailed and would pretty much only be for the most astute of viewers, but the one with the portrait may have popped out to some.
However, like some other whodunnits, Knives Out is filled with Eater eggs.
Rian Johnson has been talking about his movie a lot – which makes sense as Benoit Blanc is soon going to be a franchise character – and has previously confirmed some of the other Easter eggs in the movie.