1st Movie Kiss

The May Irwin Kiss (1896) - William Heise

The May Irwin Kiss (aka The John C. Rice-May Irwin Kiss) is a controversial re-enactment of the performers' end-scene kiss from the stage musical, "The Widow Jones", written by John J. McNally. The filmed action results in the world's first on-screen kiss.

http://www.imdb.com/title/tt0139738/