With subtitle and first teaser for Star Wars: The Rise of Skywalker finally revealed at Star Wars Celebration Chicago, actor Mark Hamill has decided to have a little fun with fans on social media.In a post on Twitter, Hamill shared the teaser for The Rise of Skywalker while also trolling fans with his own humorous suggestions for Episode IX's subtitle, adding a bit more fuel to the fire of what it might refer to in the process. "It's not #EpisodeIXFromHisNap or even my suggestion: #EpisodeIXABunchMoreStuffHappens - It's #EpisodeIXTheRiseOfSkywalker!," Hamill wrote in the post. "It's time for the 8 months of speculation to begin. Is that Skywalker KYLO? LEIA? ANAKIN? LUKE? A previously unknown SKYWALKER? Is REY a Skywalker? #CoolTitle"RELATED: Star Wars: Rian Johnson Reacts to Rise of Skywalker Teaser

Episode IX's subtitle has led to many questions about what exactly it's referring to. Early speculation is suggesting that this could be teasing that The Rise of Skywalker will retcon Rey's parentage reveal from Star Wars: The Last Jedi, revealing her as a Skywalker, something Hamill brought up in his tweet.

If Rey's parentage is in fact retconned, The Last Jedi's Rian Johnson has let it be known that he's just happy to sit back and enjoy what J. J. Abrams has in store for Episode IX. The writer-director also shared his excitement for Star Wars: The Rise of Skywalker in a post to Twitter earlier today.

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Directed and co-written by J.J. Abrams, Star Wars: The Rise of Skywalker stars Daisy Ridley, Adam Driver, John Boyega, Oscar Isaac, Lupita Nyong’o, Domhnall Gleeson, Kelly Marie Tran, Joonas Suotamo, Billie Lourd, Keri Russell, Anthony Daniels, Mark Hamill, Billy Dee Williams and Carrie Fisher, with Naomi Ackie and Richard E. Grant. The film arrives December 20.