Of course, Star Trek did not make its debut until September 8, 1966, but Leonard Nimoy has been playing Mr. Spock since filming the pilot of  The Cage in 1964!

Leonard, Congratulations on embodying and evolving such a charming, cool, lovable, and enduring character for all these years.  The world is a happier place because of Mr. Spock!  Spock will endure forever.  Thank you, and may you and he truly Live Long and Prosper!   😀