Gosford Park (2001)

Oh my God, they're in some mansion in the English countryside, like with maids and butlers and shit, and I think someone gets murdered, and the hot schoolgirl from Trainspotting might be in it, and people talk confidentially in the kitchen. I think this movie was maybe actually pretty good, although I can't see how.

Oh, that actress. (Not even actually 100% sure this is from Gosford Park.
Found out while Googling it that it's Robert Altman! Would not have said that.)