Since it's been so long since the original "Star Trek" series premiered, most of the actors from it have passed away. However, a few are still making their mark on the world.

William Shatner, who played Captain James Tiberius Kirk, is still thriving at the age of 92 at the time of writing. Not only that, but he's far from retirement.

He's continued to take on acting work, with some recent examples including a 2022 turn on "The Masked Singer" and a role as host for the 2023 reality TV series "Stars on Mars."

George Takei climbed to fame playing Hikaru Sulu in "Star Trek". In the decades since the show ended, he's remained quite active as an actor and political activist.

At the age of 86, most of his recent work has been voice acting. He's played characters in shows like "Avatar: The Last Airbender," "The Simpsons," and "BoJack Horseman."

Walter Koenig, now 87 years old, played Ensign Pavel Chekov in the original series, and his most notable work has generally been in the realm of science fiction.

He hasn't been as active over the last decade, but he still works from time to time. In 2023, he briefly reprised his role as Chekov for "Star Trek: Picard" Season 3.