20/20 Season 41 Episode 21 2017

20/20 Season 41 Episode 21: "20/20" features the stars of the most influential romantic movies, takes viewers behind the scenes and dissects the most memorable moments from these classics. The special will feature interviews with actress Katherine Heigl, from "27 Dresses"; Nia Vardalos and Andrea Martin from "My Big Fat Greek Wedding"; and Dakota Johnson and Jamie Dornan from the "Fifty Shades" films.