Filming has finally begun on the final installment of the Skywalker Saga, with Star Wars: Episode IX set to come out at the end of 2019. Abrams. One such actor is excited to get to work, and just revealed that he's begun filming on Episode IX. Lost star Dominic Monaghan was recently announced as joining the cast, and the actor posted about his stint in the galaxy far, far away. Monaghan is joining newcomers such as Richard E. Grant, Naomi Ackie, Matt Smith, and Keri Russell.