Phil Lord and Christopher Miller announced Tuesday that they were stepping down as directors of the Star Wars Han Solo spinoff movie. The pair cited “creative differences” in a statement, while Lucasfilm chief Kathleen Kennedy attributed it to “different creative visions.” While Kennedy did not elaborate, sources cited by The Hollywood Reporter said Lord and Miller were fired because the tone of their work was not what screenwriter Lawrence Kasdan had in mind with his script. Kasdan, who shaped Solo’s character in Empire Strikes Back, wrote the script for the new film with his son, Jon. There are still several weeks left in the shoot and it’s unclear who is in charge of it. According to The Hollywood Reporter, Ron Howard is a potential successor to Lord and Miller. The film is slated for release on May 25, 2018.