Premiere
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A premiere, also spelled première, is the debut of a work, i.e. play, film, dance, musical composition, or even a performer in that work.
Film premiere for Flatliners, Grauman's Chinese Theatre, Hollywood, 1990
Art release
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An art release is the premiere of an artistic production and its presentation and marketing to the public.
Premiere
…Film festival Film release Television pilot…
Film premieres can be elaborate media events, such as this 2012 exhibition of Celebration Day with promotional artwork on the Hammersmith Apollo.