premier / premiere are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
premier: (verb) be performed for the first time. (verb) perform a work for the first time. (adjective) first in rank or degree. (adjective) preceding all others in time.
premiere: (noun) the first public performance of a play or movie.
premier: p·r·eh·m·IH·r
premiere: p·r·eh·m·IH·r
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)