Edit: Ron Howard is the new director of the film.
Original post below:
"Phil Lord and Christopher Miller are talented filmmakers who have assembled an incredible cast and crew, but it’s become clear that we had different creative visions on this film, and we’ve decided to part ways. A new director will be announced soon,” said Kathleen Kennedy, president of Lucasfilm in a statement.
“Unfortunately, our vision and process weren’t aligned with our partners on this project. We normally aren’t fans of the phrase ‘creative differences’ but for once this cliché is true. We are really proud of the amazing and world-class work of our cast and crew,” stated Phil Lord and Christopher Miller.
The release date of May 25, 2018, remains unchanged.