James Franco has one biological brother, Tom Franco.
They are the sons of Betsy Lou (née Verne) and Douglas Eugene Franco, and were raised in Palo Alto, California. In addition to his brother, James has two half brothers from his father's first marriage, who are not prominently active in the public eye. This article explains the fraternal relationships in detail, including verified first names, birth years where commonly reported, and professional activities, so that the familial facts are clear and up-to-date for readers seeking a reliable reference.