Actor Walter Koenig, who portrayed Pavel Chekov on the original “Star Trek” series and in seven feature films, died Sunday night at home in North Hollywood. He was 90.
Mr. Koenig died of natural causes while surrounded by family members, his representative said.
“We extend our deepest condolences to Walter’s family, friends, colleagues, and the millions of fans whose lives he touched over the decades,” said Zachery McGinnis, founder of Galactic Productions, a celebrity appearance agency that lists the late actor among its clients.
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Mr. Koenig was introduced as Ensign Chekov in season 2 of “Star Trek” at the age of 30 to attract teenage and younger viewers. Creator Gene Roddenberry added the Russian navigator to the crew to highlight an optimistic future where Earth had moved past regional conflicts.
“Walter helped inspire audiences with his optimism, humor, and adventurous spirit,” Mr. McGinnis said in a statement. “Beyond ’Star Trek,’ his long and distinguished career showcased his versatility as an actor and his genuine love for his craft.”
Mr. Koenig was also a regular on the Star Trek convention circuit.
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“He shared his kindness, wit, and appreciation with everyone fortunate to meet him,” Mr. McGinnis said. “He understood what Star Trek meant to people and embraced the community that grew around it.”

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