The aims of this research were to find out the types and the function of address form in the Mortdecai movie. It was a descriptive qualitative research. To collect the data, documentation and observation method are used.The source of data was the Mortdecai movie in 2015 with the action/comedy genre, the data were the dialogue in the Mortdecai movie. To analyze the data, a sociolinguistics approach was used with the theory of Gumperz, for the address form Robinson theory was used. Researchers were also using Wardhaugh's theory for the types of address form and Chaika's theory for the function of address form. The result of the research, six types of address form were found and three functions of address form were found in the Mortdecai movie. For the types of address form those were, First Name (FN), Title plus Last Name (TLN), Title alone (T), Last Name (LN), Pet Name (PN) and Kinship Term (KT), and for the function were to show intimacy, power difference, and respect. Each use of the address form was different depending on a context, relationship, or position that a person had, while the function of the address form defined the intention of the person to addressed someone. Keywords: Sociolinguistics, Address Form, Mortdecai