Star Trek 4 was the working title of an unproduced American science fiction film in development at Paramount Pictures based on the television series Star Trek by Gene Roddenberry. It was intended to be part of the Star Trek film franchise and was originally announced as the fourth installment of the franchise's reboot films following Star Trek Beyond (2016). There were several iterations of the film in development with different filmmakers between 2015 and 2025, alongside alternate attempts to continue the film franchise.