#9 Michael Dorn
Star Trek series: Star Trek: The Next Generation, Star Trek: Deep Space Nine
Character name: Worf
Having played Worf in all seven seasons of The Next Generation and in the last four seasons of Deep Space Nine, Dorn has appeared more times as a regular Star Trek cast member than any other actor in the franchise’s history. In addition to these two Star Trek TV series, the actor also reprised the role in five Star Trek movies.
Since the end of his Star Trek career, Dorn has done several voice projects for TV, including Disney’s The Lion Guard, The CW’s Arrow, Nickelodeon’s Teenage Mutant Ninja Turtle, and the upcoming Amazon Prime Video superhero series Invincible.