There's something about the chemistry between Emilia Clarke and Sam Claflin [1] that is just so mesmerizing. On Monday, the two costars showed off their playful sides when they attended the premiere of their film [2], Me Before You, in NYC. Emilia — who glowed in a ruffled lilac dress — shared a few laughs with Sam as they posed for photographers and met up with the rest of the movie's cast. In the film adaptation of JoJo Moyes's bestselling novel [3], the Game of Thrones actress plays a working-class woman named Louisa Clark opposite Sam, who plays the quadriplegic William Traynor. If you haven't already read the book, here's everything you need to know about it [4] before it hits theaters on June 3.