Who is Sentinel Prime?

Probably a lot of fans of the movie theaters do not know who the actors behind the film characters tranformer sentinel prime ?
Starring sentinel prime is Leonard Simon Nimoy was born in Boston , Massachusetts , March 26, 1931 - died in Bel Air , California , February 27, 2015 at the age of 83 years ...
Leonard is an actor , film director , poet and photographer of the American ...
Leonard 's first famous Star Trek ...
Leonard died of complications of chronic obstructive pulmonary disease .