The World of Henry Orient (1964)

Henry Orient (Peter Sellers) is a concert pianist having an affair with a married woman. Meanwhile, Val (Tippy Walker) and Gil (Merrie Spaeth), two NY private school girls are stalking him and writing about their exploits in a diary. Orient thinks they’re spies sent by the husband of his mistress… Val’s mom finds the diary and thinks Orient’s having inappropriate relations with her daughter… and then ends up having an affair with him herself. Watch the entirety of this perfect best girlfriends comedy when you get a chance! Who can resist that color saturated, 1960s NY, autumnal, idealistic high school vibe?