Worf, son of Mogh is a fictional character in the Star Trek franchise, portrayed by actor Michael Dorn. He appears in the television series Star Trek: The Next Generation (TNG), seasons four through seven of Star Trek: Deep Space Nine (DS9) and the third and final season of Star Trek: Picard, as well as the feature films Star Trek Generations (1994), Star Trek: First Contact (1996), Star Trek: Insurrection (1998), and Star Trek: Nemesis (2002) And The Undiscovered Country as the defense attorney for Kirk and McCoy.

Michael Dorn is an American actor best known for his role as the Klingon character Worf in the Star Trek franchise, appearing in all seven seasons of the television series Star Trek: The Next Generation (1987–1994), and later reprising the role in Seasons 4 through 7 of Star Trek: Deep Space Nine (1995–1999) and season three of Star Trek: Picard (2023). Dorn has appeared more times as a regular cast member than any other Star Trek actor in the franchise's history, spanning five films and 284 television episodes.