Traditionally, cytokines have been investigated as a therapeutic modality across multiple clinical trials, particularly as anti-cancer agents. However, the systemic administration of such potent, biologically-active molecules has been shown to be associated with a wide range of dose-dependent side effects and unfavorable pharmacokinetic properties, which, in a way, hinders dose escalation to therapeutically beneficial levels. To overcome the treatment-limiting toxicities of cytokines, researchers are now focusing on immunocytokines. Immunocytokines are fusion proteins, featuring the target specificity of antibodies and the immunological response mediating capabilities of specific cytokines. These engineered pharmacologically-active molecules have, so far, demonstrated better efficacy and reduced toxicity compared to conventional cytokine-based therapies.