In Old California is a silent movie filmed in 1910. It was the first movie shot in Hollywood, California. It was directed by D. W. Griffith of the Biograph Company then based in New York, New York. The film is a melodrama about the Mexican era of California.
For years the first film thought shot in Hollywood was Cecil B. DeMilles feature film The Squaw Man 1914, which does hold the record of first feature film made in Hollywood. The discovery of Griffiths film made it the first movie of any length filmed in Hollywood.
Source: Wikipedia