An antibody that specifically binds to IL-1R3, comprising an antibody heavy chain amino acid sequence of SEQ ID NO: 1 and a light chain amino acid sequence of SEQ ID NO: 2. A pharmaceutical composition is provided comprising the said antibody and a pharmaceutically acceptable diluent, carrier or excipient. Also said antibody for use in treating a disease or disorder in a subject in need thereof. The disease or disorder may be an autoimmune or autoinflammatory disease or disorder.