What 1927 film is widely considered the first 'talkie' with synchronized dialogue?

The 1927 film widely considered the first talkie with synchronized dialogue is The Jazz Singer. Starring singer Al Jolson, it was Warner Bros.' landmark part-talkie and used the Vitaphone sound-on-disc system to synchronize recorded music, singing, and brief spoken exchanges.

The film premiered on October 6, 1927, and contains only a small amount of spoken dialogue; most of its story is presented through silent-film intertitles. Jolson's famous line, “Wait a minute, wait a minute, you ain't heard nothin' yet,” helped make the film a sensation and became closely associated with cinema's transition to sound.

The Jazz Singer was not the first film to use synchronized sound of any kind. Earlier productions had featured recorded music, sound effects, or short dialogue scenes. Nor was it the first all-talking feature: that distinction is generally given to Lights of New York, released in 1928. Its importance lies in proving that a feature film with synchronized speech could become a major commercial success.