The Hippo pathway is crucial in organ size control and its dysregulation contributes to tumorigenesis. Core components of the Hippo pathway include the protein kinases of MST1/2, MAP4Ks, LATS1/2, the transcription co-activators YAP/TAZ and their DNA binding partners TEADs. LATS phosphorylates YAP/TAZ to promote cytoplasmic localization and degradation, thereby inhibiting YAP/TAZ and cell growth. The Hippo pathway is regulated by a wide range of signals, including cell density, GPCR, cellular energy levels, and mechanical cues. We recently discovered that TEAD shuttles to cytoplasm in a Hippo independent manner. Moreover, the Hippo pathway also plays a critical role in suppressing cancer immunity. The emerging role of the Hippo pathway in tumorigenesis suggests potential therapeutic value of targeting this pathway for cancer treatment.