Feb. 27, 2015 -- Leonard Nimoy, best known for his role as Mr. Spock on "Star Trek," died Friday morning at age 83.
The actor was hospitalized earlier this week and died at his home in Los Angeles. His wife, Susan Bay Nimoy, confirmed his death and said the cause was end-stage chronic obstructive pulmonary disease (COPD), The New York Times reported.
Last year, Nimoy announced he had the disease and said it was caused by his years of smoking, which he gave up three decades ago.
Nimoy was cast as Mr. Spock -- the Vulcan first officer of the starship Enterprise -- in the original "Star Trek" series, which first aired in the mid-1960s but was canceled after three seasons. Nimoy continued to play Spock in subsequent movies and TV series, with his last appearance in the 2013 movie "Star Trek Into Darkness."