Walter Koenig, the actor who played Ensign Pavel Chekov in the original Star Trek TV series and multiple movies, has sadly passed away at the age of 90. His family confirmed that he died at home in Los Angeles on Sunday, with his daughter and niece present (via The Hollywood Reporter).George Takei, his co-star who played Lieutenant Hikaru Sulu, led the tributes. On Instagram, he wrote: "My heart is heavy. Walter Koenig, our Ensign Pavel Chekov, passed away early today."