The Philadelphia Story (1940)

A fast-talking, opinionated socialite (Hepburn) is soon to be married, but two tall, suited, skinny spanners (Stewart and Grant) put themselves on the visitors list, effectively clogging up the works with their smugness and charm.
TPS is a classic era romantic comedy based on a play by Phillip Barry. The three stars light up every scene each time they cross paths, testing the tolerances and attractions of each other, inadvertently or otherwise. It starts slow, but once it hits its stride it doesn't ever disappoint. The supporting cast deserve credit, too, from the eldest to the youngest they're all excellent.

5 names for a boat out of 5