The 31-year-old Game of Thrones and Cinderella has joined the cast of the upcoming comedy film Ibiza, THR reports. Richard will be joining Vanessa Bayer, Gillian Jacobs, and Phoebe Robinsonin the upcoming movie. Ibiza follows the story of a woman (Gillian) who “goes on a business trip to Spain to close a big deal but instead finds herself on a wild ride of partying and clubbing, where …