If You Knew What I Knew Poster If You Knew What I Knew Amazon » eBay » The film "If You Knew What I Knew" is a comedy from 2007.. If You Knew What I Knew Details Title: If You Knew What I KnewYear: 2007Genres: Comedy Rate this title Have you seen If You Knew What I Knew? Rate it between 1 to 10 below. Log in to your account if you want to rate this title.